ECOLAB INC.
                              1977 STOCK INCENTIVE PLAN

                                  As Amended Through
                                   November 1, 1996

1.   Purposes

     The purposes of the Plan are to provide additional incentive for such Key
     Employees of the Company, its subsidiaries and divisions, as may be
     designated for participation in the Plan, by authorizing payment of
     incentive compensation in shares of Common Stock and by encouraging such
     Key Employees to invest in shares of Common Stock, thereby furthering their
     identity of interest with the interest of the Company's stockholders,
     increasing their stake in the future growth and prosperity of the Company
     and stimulating and sustaining constructive and imaginative thinking; and
     to enable the Company, by offering comparable incentives, to induce the
     employment and continued employment of Key Employees and to compete with
     other organizations in attracting and retaining the services of competent
     executives.

2.   Definitions

     Unless otherwise required by the context, the following terms, when used in
     the Plan, shall have the meanings set forth in this section 2.           

     Amendment Agreement:  An agreement entered into between the Corporation and
     an employee of the Corporation or a Subsidiary in order to amend a Stock
     Incentive agreement relating to the Plan.    

     Board of Directors or Board:  The Board of Directors of the Company.

     Committee:  Such committee or committees as shall be appointed by the Board
     of Directors to administer the Plan pursuant to the provisions of section
     10.

     Common Stock:  The Common Stock of the Company, par value $1.00 per share,
     or such other class of shares or other securities as may be applicable
     pursuant to the provisions of section 8.

     Company:  Ecolab Inc., a Delaware corporation.

     Fair Market Value:  As applied to any date, shall be the mean of the high
     and low selling prices of Common Stock, as reported on the principal stock
     exchange on which such stock is listed and traded, or if the stock is not
     listed on an exchange, then Fair Market Value shall be the mean of the
     representative bid and asked quotations for such stock in the
     over-the-counter market on such date, or if no such  sales were made on
     such date, on the next preceding date on which there were such sales of
     Common Stock on such Exchange or in the over-the-counter market, provided,
     however, that if such method of determining Fair Market Value shall not be
     consistent with regulations of the Treasury Department at the time
     applicable to the determination of Fair Market Value in respect of a Stock
     Incentive, Fair Market Value in the case of such Stock Incentive shall be
     determined in accordance with such regulations and shall mean the value as
     so determined.

     ISO:  An Option which is intended to qualify as an incentive stock option
     under Section 422A of the Internal Revenue Code.




     Key Employee:  An employee of the Company or of a Subsidiary, including an
     officer or director who is an employee, who in the opinion of the Committee
     can contribute significantly to the growth and successful operations of the
     Company or a Subsidiary.  The recommendation of the grant of a Stock
     Incentive to an employee by the Committee shall be deemed a determination
     by the Committee that such employee is a Key Employee.

     Nonqualified Stock Option:  An Option which is not intended to qualify as
     an incentive stock option under Section 422A of the Internal Revenue Code.

     Option:  A Nonqualified Stock Option or an ISO.

     Plan:  The Ecolab Inc. 1977 Stock Incentive Plan herein set forth as the
     same may from time to time be amended.

     Stock Appreciation Right:  A right to receive a number of shares of Common
     Stock or, at the election of the Company, cash, in either event based on
     the increase in the Fair Market Value of the number of shares of Common
     Stock subject to such right as set forth in section 6.

     Stock Award:  An issuance or transfer of shares of Common Stock or an
     undertaking to issue or transfer such shares in the future as set forth in
     section 7.

     Stock Incentive:  An incentive granted under the Plan in one of the forms
     provided for in section 3.

     Subsidiary:  A corporation or other form of business association of which
     shares (or other ownership interests) having 50% or more of the voting
     power are owned or controlled, directly or indirectly, by the Company. 
     Provided, that for the purpose of the continued effectiveness of Stock
     Incentives granted to Key Employees of the Corporation or a Subsidiary
     prior to the employment of such Key Employees by a joint venture entity
     organized by the Corporation and Henkel KGaA ("the Joint Venture
     Entities"), such Joint Venture Entities, for such initial period as the
     Corporation, directly or indirectly, owns or controls shares or other
     ownership interests having 20% or more of the voting power of such Joint
     Venture Entity, shall be deemed to be a Subsidiary with respect to such Key
     Employees who have entered into an Amendment Agreement with terms and
     conditions satisfactory to the General Counsel of the Corporation.
     
     
3.   Grants of Stock Incentives

     (a)  Subject to the provisions of the Plan, the Committee may at any time,
          or from time to time, grant Stock Incentives under this Plan to, and
          only to, Key Employees, provided, however, that no Stock Incentive
          shall be granted to a Key Employee who at the time of  such grant is a
          member of the Board of Directors except by or upon the recommendation
          of the Committee, or by a majority of disinterested members of the
          Board as provided in paragraph (b) of section 10.

     (b)  Stock Incentives may be granted in the following forms:

          (i)  an Option, which may be an ISO or a Nonqualified Stock Option, in
               accordance with section 5, or 
          (ii) a Stock Appreciation Right or Limited Right, in accordance with
               section

                                         -2-



                    6, or
          (iii)     a Stock Award, in accordance with section 7, or
          (iv)      a combination of any of the foregoing.

4.   Stock Subject to the Plan

     (a)  Subject to the provisions of paragraph (c) of this section 4 and of
          section 8, the aggregate number of shares of Common Stock which may be
          issued or transferred pursuant to Stock Incentives granted under the
          Plan shall not exceed 2,382,115 shares of Common Stock.

     (b)  Authorized but unissued shares of Common Stock and  shares of Common
          Stock held in the treasury, whether acquired by the Company
          specifically for use under the Plan or otherwise, may be used, as the
          Board of Directors may from time to time determine, for purposes of
          the Plan, provided, however, that any shares acquired or held by the
          Company for the purposes of the Plan shall be and at all times remain
          treasury shares of the Company, irrespective of whether such shares
          are entered in a special account for purposes of the Plan, and shall
          be available for any corporate purpose unless and until transferred to
          a Key Employee in accordance with the terms and conditions of a Stock
          Incentive.

     (c)  If any shares of Common Stock subject to a Stock Incentive shall not
          be issued or transferred and shall cease to be issuable or
          transferable because of the termination, in whole or in part, of such
          Stock Incentive or, subject to the provisions of paragraph (h) of
          section 5 and paragraph (d) of section 6, for any other reason, or if
          any such shares shall, after issuance or transfer, be reacquired by
          the Company or a Subsidiary because of an employee's failure to comply
          with the terms and conditions of a Stock Incentive, the  shares not so
          issued or transferred, or the shares so reacquired by the Company or a
          Subsidiary, shall no longer be charged against the limitation provided
          for in paragraph (a) of this section 4 and may again be made subject
          to Stock Incentives.

5.   Options

     Stock Incentives in the form of Options shall be subject to the following
     provisions:

     (a)  The per share Option exercise price shall be determined by the
          Committee from time to time, but in no instance shall be less than the
          Fair Market Value of a share of Common Stock on the date the Option
          shall be granted.

     (b)  Each Option shall expire at such time as is determined by the
          Committee, which determination shall be made at the time such Option
          is granted.  No ISO shall expire later than ten years from the date
          such ISO shall be granted, and no Nonqualified Stock Option shall
          expire more than ten years and three months from the date such 
          Nonqualified Stock Option shall be granted.  When an Option is granted
          for a term of less than the maximum  term specified in the foregoing
          sentence, the Committee may, with the holder's consent and at any time
          prior to the expiration of the Option, extend its term for a period
          which, when added to the original term of the Option, shall not be
          longer than such maximum term.

     (c)  The Option may be exercised solely by the person to whom granted
          except as hereinafter provided in the case of such person's death. 
          During the lifetime of the optionee, the Option and any rights and
          privileges pertaining thereto shall not 

                                         -3-



          be transferred, assigned,  pledged or hypothecated in any way, whether
          by operation of law or otherwise, and shall not be subject to
          execution, attachment or similar process.

     (d)  The optionee must complete twelve months of continuous  employment
          with the Company or a Subsidiary, or both, immediately following the
          date on which the Option  shall be granted before any part of the
          Option may be exercised by him.  Whether authorized leave of absence
          or absence for military or government service shall constitute
          termination of employment or interruption of continuous employment for
          the purposes of the Plan shall be determined by the Committee on an
          individual basis.

     (e)  After the completion of the required period of employment, and subject
          to the terms of the Option, the Option may be exercised, in whole or
          in part, from time to time during the balance of the term of the
          Option.  The Committee may, in its discretion, accelerate the  date on
          which all or any portion of an Option becomes exercisable, provided,
          however, that no ISO granted prior to January 1, 1987 shall be
          exercisable while there is outstanding any incentive stock option
          which was granted before the granting of such ISO, to purchase stock
          in the Company or in a corporation which at the date of such ISO is a
          parent or subsidiary of the Company or the predecessor of any such
          corporation.

     (f)  The Option shall terminate if and when the optionee shall cease to be
          an employee of the Company or its Subsidiaries, except as follows:

          (i)  If employment of the optionee by the Company or its Subsidiaries
               shall be terminated, upon the retirement or disability of the
               optionee under a retirement, pension or disability plan approved
               by the Board or the Committee, after he shall have completed
               twelve months of continuous employment following the date upon
               which the Option was granted, then the Option shall be
               exercisable within such period as shall be set  forth in the
               Option grant, but not later than three years after the date of
               termination of employment and not after the expiration of the
               specific period fixed in the Option grant as in effect at the
               time.

          (ii) If the optionee shall die while in the employ of the Company or a
               Subsidiary, or within three months of the termination of his
               employment with the Company or its Subsidiaries after he shall
               have completed twelve months of continuous employment following
               the date upon which the Option was granted, then the Option shall
               be exercisable within such period as shall be set forth in the
               Option grant by such person or persons as shall have acquired the
               optionee's rights under the Option by Will or by the laws of
               descent and distribution, but not later than three years after
               the date of death and not after the expiration of the specific
               period fixed in the Option grant as in effect at the time.

         (iii) If employment of the optionee by the Company or its Subsidiaries
               shall have terminated for any reason other than those specified
               in subparagraphs (f)(i) and (f)(ii) above and after he shall have
               completed at least twelve months of  continuous employment
               following the date upon which the Option is granted, subject to
               subparagraph (f)(ii) above, the Option shall be exercisable by
               him only within the three months  after such termination, but not
               after the expiration of the term of the Option.

                                         -4-



     (g)  (i)  Shares purchased under the Option shall be paid for in full, in
               cash or such other forms of payment as are approved by the
               Committee, at the time of the exercise of the Option as to such
               shares.

          (ii) The Committee may, in its sole discretion, permit an optionee to
               exercise an Option (other than an ISO granted prior to May 12,
               1988) by delivering to the Company a properly executed Broker
               Exercise Notice in form and substance acceptable to the
               Committee.  This Broker Exercise Notice shall contain irrevocable
               instructions from the optionee to the Company to issue to a
               broker the stock certificates for the  shares to be purchased
               upon exercise of the Option, and the Company shall, if the
               Committee decides to permit the Option to be exercised in this
               manner, acknowledge to the broker  that the Company consents to
               such procedure.  In addition, the Broker Exercise Notice shall
               contain or be accompanied by irrevocable instructions from the
               optionee to such broker to sell a number of shares of Common
               Stock, or loan to the  optionee an amount, sufficient to pay the
               exercise price of the Option and any withholding obligations due
               upon such exercise and to promptly deliver to the Company the
               amount of such sale or loan proceeds.

     (h)  The Option agreements or Option grants authorized by the Plan may
          contain such other provisions as the Committee shall deem advisable. 
          Without limiting the foregoing and if so provided in the Option, or if
          so authorized by the Committee and subject to such terms and
          conditions as are specified in the Option or by the Committee, the
          Company may, with the consent of the  holder of the Option, and at any
          time or from time to time, cancel all or a portion of the Option then
          subject to exercise and discharge its obligation in respect of the
          Option either by payment to the holder of an amount of money equal to
          the excess, if any, of the Fair Market Value, at such time or times,
          of the shares subject to the portion of the Option so  cancelled over
          the aggregate purchase price of such shares, or by issuance or
          transfer to the holder of shares of Common Stock with a Fair Market
          Value, at such time or times, equal to any such excess, or by a
          combination of cash and shares.  The number of shares of Common Stock
          subject to the Option, or portion thereof, so cancelled shall, in the
          event that a  payment of money or transfer of shares is made by the
          Company in respect of such cancellation, be charged against the
          maximum limitation set forth in paragraph (a) of section 4.

     (i)  Options may be granted under the Plan from time to time in
          substitution for stock options held by employees of other corporations
          who are about to become employees of the Company or a Subsidiary as
          the result of a merger or consolidation of the employing corporation
          with the Company or a Subsidiary, or the acquisition by the Company or
          a Subsidiary of the assets of the employing corporation, or the
          acquisition by the Company or a Subsidiary of stock of the employing
          corporation as the  result of which it becomes a Subsidiary.  The
          terms and  conditions of the substitute Options so granted may vary
          from the terms and conditions set forth in paragraphs (a) through (h)
          of this section 5 to such extent as the Board of Directors at the time
          of grant may deem appropriate to conform, in whole or in part, to the
          provision of the options in substitution for  which they are granted. 
          This paragraph shall not require the Company to grant Options under
          the Plan to any such persons, nor shall it prohibit the Company from
          assuming any options as a part of any acquisition, merger, or
          consolidation.

     (j)  (i)  The aggregate Fair Market Value, determined as of the date an
               Option is 

                                         -5-




               granted, of the Common Stock for which a Key Employee may be
               granted ISOs in any calendar year after December 31, 1980 and
               prior to January 1, 1987, under all stock option plans of the
               Company and its Subsidiaries shall not exceed $100,000 plus any
               unused limit carryover to such year  (within the meaning of
               Section 422A of the Internal Revenue Code).

          (ii) With respect to ISOs granted on or after January 1, 1987, the
               aggregate Fair Market Value, determined as of the date an ISO is
               granted, of the Common Stock with respect to which incentive
               stock options (within the meaning of Section 422A of the Internal
               Revenue Code) are exercisable for the first time by an optionee
               during any calendar year (under the Plan and any other incentive
               stock option plans of the Company and any parent corporation
               (within the meaning of Section 425(e) of the Internal Revenue
               Code) or Subsidiary) shall not exceed $100,000.

     (k)  The Committee may, with the consent of the optionee affected thereby,
          accept the surrender of any outstanding Option, to the extent not
          previously exercised, and the Committee may authorize the grant of new
          Options in substitution therefor to the extent not previously
          exercised. 

6.   Stock Appreciation Rights and Limited Rights

     (a)  Stock Appreciation Rights may be granted in connection with any Option
          granted under the Plan, either at the time of the grant of such Option
          or at any time thereafter during the term of the Option, or may be
          granted independently of the grant of an Option.

     (b)  If granted in connection with an Option, Stock Appreciation Rights
          shall entitle the holder of the related Option, upon exercise of the
          Stock Appreciation Rights, to surrender the Option, or any portion
          thereof, to the extent unexercised, and to receive a number of shares
          of Common Stock, or cash, determined pursuant to paragraph (c)(iii) of
          this section 6.  Such Option shall, to the extent so surrendered,
          thereupon  cease to be exercisable.  If granted independently of an
          Option, Stock Appreciation Rights shall entitle the holder of the
          Stock Appreciation Rights to receive a  number of shares of Common
          Stock, or cash, determined pursuant to paragraph (c)(iii) of this
          section 6.

     (c)  Stock Appreciation Rights shall be subject to the following terms and
          conditions and to such other terms and conditions not inconsistent
          with the Plan as shall from time to time be approved by the Committee.

          (i)  If granted in connection with an Option, Stock  Appreciation
               Rights shall be exercisable at such time or times and to the
               extent, but only to the extent, that the Option to which they
               relate shall be exercisable.  If granted independently of an
               Option, Stock Appreciation Rights shall be  exercisable at such
               time or times as shall be determined by the Committee at the time
               of the grant of the Stock Appreciation Rights but in no event
               later than three months after the  employment of the holder of
               the Stock Appreciation Rights by the Company or a Subsidiary
               shall have terminated other than by reason of death or by reason
               of retirement or disability under a retirement, pension or
               disability plan approved by the Board or the Committee.  In the
               event of termination of employment by reason of death, Stock
               Appreciation Rights shall be exercisable by the 

                                         -6-



               beneficiary designated pursuant to paragraph (g) of section 11 no
               later than three years after such termination of employment.  In
               the event of termination of employment by reason of retirement or
               disability under a plan specified above, Stock Appreciation
               Rights shall be exercisable no later  than three years after such
               termination of employment.

          (ii) Stock Appreciation Rights shall in no event be  exercisable
               unless and until the holder of the Stock Appreciation Rights
               shall have completed at least twelve months of continuous service
               with the Company or a Subsidiary, or both, immediately following
               the date upon which the Stock Appreciation Rights shall have been
               granted.  Whether authorized leaves of absence or absence for
               military or government service shall  constitute termination of
               employment or interruption of continuous employment for purposes
               of the Plan shall be determined by the Committee on an individual
               basis.

         (iii) Upon exercise of a Stock Appreciation Right, the holder thereof
               shall be entitled to receive a number of shares equal in Fair
               Market Value to the amount by which the Fair Market Value of one
               share of Common Stock on the date such Stock Appreciation Right
               is exercised exceeds the Fair Market Value of one share of Common
               Stock on the  date of grant, multiplied by the number of shares
               in respect of which the Stock Appreciation Right  shall have been
               exercised.  All or any part of the Company's obligation arising
               out of an exercise of Stock Appreciation Rights may, at the
               discretion of the Company, be settled by the payment of cash
               equal to the aggregate value of shares of Common Stock (or
               fraction of a share)  that the Company would otherwise be
               obligated to deliver under the preceding sentence of this section
               6(c)(iii).

     (d)  To the extent that Stock Appreciation Rights shall be exercised, an
          Option in connection with which such Stock Appreciation Rights shall
          have been granted shall be deemed to have been exercised for the
          purpose of the maximum limitation set forth in paragraph (a) of
          section 4.  In the case of Stock Appreciation Rights granted
          independently of an Option, the number of shares of Common Stock in
          respect of which such Stock Appreciation Rights shall be exercised
          shall be charged against the maximum limitation set forth in paragraph
          (a) of section 4.

     (e)  Stock Appreciation Rights may provide that, upon exercise of such
          Stock Appreciation Rights, the shares or cash, as the case may be,
          which the holder of such Stock Appreciation Rights shall be entitled
          to receive shall be distributed or paid in such installments and over
          such number of years as the Committee may direct, with distribution or
          payment of each such installment contingent upon continued services of
          the employee to the Company or a Subsidiary, or both (except for
          death,  disability, or retirement pursuant to the provisions of the
          pension plans of the Company or a Subsidiary, or termination of
          employment by the Company or with its consent) to the time for
          distribution or payment of such installment.

     (f)  (i)  For Stock Incentives granted prior to August 11, 1989:

               (A)  if (i) any corporation, person or other entity (other than
                    the Company) makes a tender or exchange offer for shares of
                    Common Stock pursuant to which purchases are made ("Offer"),

                                         -7-



                    (ii) the stockholders of the Company approve a definitive
                    agreement to merge or consolidate the Company with or into
                    another corporation or to sell or otherwise dispose of all
                    or substantially all of its assets, (iii) more than 25
                    percent of the Company's then outstanding Common Stock is
                    acquired by any person or group, or (iv) during any period
                    of two consecutive years, individuals who at the beginning
                    of such period were members of the Board cease for any
                    reason to constitute at least a majority thereof (unless the
                    election, or the nomination for election by the Company's
                    stockholders, of each new director was approved by a vote of
                    at least two-thirds of the directors then still in office
                    who were directors at the beginning of the period), then the
                    date of the first purchase of Common Stock pursuant to such
                    Offer, or the date of any such stockholder approval, or the
                    date on which public announcement of the acquisition of such
                    percentage shall have been made, or the date on which the
                    change in the composition of the Board set forth above shall
                    have occurred shall be the "Effective Date" of such
                    transaction or occurrence.

               (B)  the preceding section 6(f)(i)(A) shall not apply to a merger
                    or consolidation in which the Company is the surviving
                    corporation and shares of Common Stock are not converted
                    into or exchanged for stock, securities of any other
                    corporation, cash or any other thing of value and such
                    transactions shall have no Effective Date for purposes of
                    this section 6.  In case of any consolidation or merger of
                    another corporation into the Company in which the Company is
                    the surviving corporation and in which there is a
                    reclassification or change (including a change to the right
                    to receive cash or other property) of the shares of Common
                    Stock (other than a change in par value, or from par value
                    to no par value, or as a result of a subdivision or
                    combination, but including any change in such shares into
                    two or more classes or series of shares), section 8 shall
                    apply.

          (ii) (A)  For purposes of Stock Incentives granted on or after August
                    11, 1989, a "Change of Control" shall be deemed to have
                    occurred if:

                    (i)  Any "person" as such term is used in Sections 13(d) and
                         14(d) of the Securities Exchange Act of 1934 (other
                         than the Company, any trustee or other fiduciary
                         holding securities under any employee benefit plan of
                         the Company, or any corporation owned, directly or
                         indirectly, by the stockholders of the Company in
                         substantially the same proportions as their ownership
                         of stock of the Company), is or becomes, including
                         pursuant to a tender or exchange offer for shares of
                         Common Stock pursuant to which purchases are made
                         ("Offer"), the "beneficial owner" (as defined in Rule
                         13d-3 under the Securities Exchange Act of 1934),
                         directly or indirectly of securities of the Company
                         representing 25 percent or more of the combined voting
                         power of the Company's then outstanding securities,
                         other than in a transaction arranged or approved by the
                         Board of Directors prior to its occurrence; provided,
                         however, that if any such person

                                         -8-



                         shall become the beneficial owner, directly or
                         indirectly, of securities of the Company representing
                         34 percent or more of the combined voting power of the
                         Company's then outstanding securities, a Change of
                         Control shall be deemed to occur whether or not any or
                         all of such beneficial ownership is obtained in a
                         transaction arranged or approved by the Board prior to
                         its occurrence, and other than in a transaction in
                         which such person shall have executed a written
                         agreement with the Company (and approved by the Board)
                         on or prior to the date on which such person becomes
                         the beneficial owner of 25 percent or more of the
                         combined voting power of the Company's then outstanding
                         securities, which agreement imposes one or more
                         limitations on the amount of such person's beneficial
                         ownership of shares of Common Stock ("Shareholder
                         Agreement"), if, and so long as, such Shareholder
                         Agreement (or any amendment thereto approved by the
                         Board provided that no such amendment shall cure any
                         prior breach of such Shareholder Agreement or any
                         amendment thereto) continues to be binding on such
                         person and such person is in compliance (as determined
                         by the Board in its discretion) with the terms of such
                         Shareholder Agreement (including such amendment);
                         provided, however, that if any such person shall become
                         the beneficial owner directly or indirectly, of
                         securities of the Company representing 50 percent or
                         more of the combined voting power of the Company's then
                         outstanding securities, a Change of Control shall be
                         deemed to occur whether or not such beneficial
                         ownership was held in compliance with a binding
                         Shareholder Agreement.

                    (ii) During any period of two consecutive years (not
                         including any period prior to August 11, 1989),
                         individuals who at the beginning of such period
                         constitute the Board, and any new director (other than
                         a director designated by a person who has entered into
                         an agreement with the Company to effect a transaction
                         which would constitute a Change of Control pursuant to
                         clause (i), (iii) or (iv) of this section 6(f)(ii)(A))
                         whose election by the Board or nomination for election
                         by the Company's stockholders was approved by a vote of
                         at least two-thirds of the directors then still in
                         office who either were directors at the beginning of
                         the period or whose election or nomination for election
                         was previously so approved, cease for any reason to
                         constitute at least a majority thereof;

                   (iii) The stockholders of the Company approve a merger or
                         consolidation of the Company with any other
                         corporation, other than (x) a merger or consolidation
                         which would result in the voting securities of the
                         Company outstanding immediately prior thereto
                         continuing to represent (either by remaining
                         outstanding or by being converted into voting
                         securities of the surviving entity) more than 80

                                         -9-



                         percent of the combined voting power of the voting
                         securities of the Company or such surviving entity
                         outstanding immediately after such merger or
                         consolidation or (y) a merger or consolidation effected
                         to implement a recapitalization of the Company (or
                         similar transaction) in which no person acquires a
                         percentage of the combined voting power of the
                         Company's then outstanding securities which would
                         constitute a Change of Control pursuant to section
                         6(f)(ii)(A)(i).  In case of any consolidation or merger
                         of another corporation into the Company in which the
                         Company is the surviving corporation and in which there
                         is a reclassification or change (including a change to
                         the right to receive cash or other property) of the
                         shares of Common Stock (other than a change in par
                         value, or from par value to no par value, or as a
                         result of a subdivision or combination, but including
                         any change in such shares into two or more classes or
                         series of shares), section 8 shall apply.

                    (iv) The stockholders of the Company approve a plan of
                         complete liquidation of the Company or an agreement for
                         the sale or disposition by the Company of all or
                         substantially all of the Company's assets.

               (B)  In the event a Change of Control shall be deemed to have
                    occurred pursuant to the foregoing section 6(f)(ii)(A), the
                    "Effective Date" of such Change of Control shall (1) in the
                    case of an Offer, be the date of the first purchase of
                    Common Stock pursuant to such Offer, (2) in the case of any
                    Change of Control (other than pursuant to an Offer) pursuant
                    to section 6(f)(ii)(A)(i), be the date on which public
                    announcement of the acquisition of the applicable triggering
                    percentage shall have been made, (3) in the case of a Change
                    of Control pursuant to section 6(f)(ii)(A)(ii), the date on
                    which the change in the composition of the Board shall have
                    occurred, (4) in the case of a Change of Control pursuant to
                    section 6(f)(ii)(A)(iii) or (iv), the date of the applicable
                    stockholder approval.

     (g)  (i)  The Committee shall have authority to grant a limited stock
               appreciation right (a "Limited Right") to the holder of any
               Option granted under the Plan (the "Related LSAR Option") with
               respect to all or some of the shares of Common Stock covered by
               such Related LSAR Option.  A Limited Right may be granted either
               at the time of grant of the Related LSAR Option or any time
               thereafter during its term.  A Limited Right may be granted to an
               optionee irrespective of whether such optionee is being granted
               or has been granted a Stock Appreciation Right under this section
               6.  A Limited Right may be exercised only during the sixty-day
               period beginning on an Effective Date (as defined in section
               6(f)(i)(A) or section 6(f)(ii)(B) hereof).  Each Limited Right
               shall be exercisable only if, and to the extent that, the Related
               LSAR Option is exercisable and, in the case of a Limited Right
               granted in respect of an ISO, only when the Fair Market Value per
               share of Common Stock exceeds the option price per share. 
               Notwithstanding the provisions of the two immediately preceding
               sentences, no Limited Right may be exercised until the 

                                         -10-



               expiration of six (6) months from the date of grant of the
               Limited Right.  Upon the exercise of a Limited Right, such
               Related LSAR Option and any Stock Appreciation rights granted in
               connection therewith shall cease to be exercisable to the extent
               of the shares of Common Stock with respect to which such Limited
               Right is exercised, but shall be considered to have been
               exercised, to that extent for purposes of determining the number
               of shares of Common Stock available for the grant of further
               Options and Stock Appreciation Rights pursuant to the Plan.  Upon
               the exercise or termination of a Related LSAR Option, the Limited
               Right with respect to such Related LSAR Option shall terminate to
               the extent of the shares of Common Stock with respect to which
               the Related LSAR Option was exercised or terminated.

          (ii) Upon the exercise of a Limited Right, the holder thereof shall
               receive in cash whichever of the following amounts is applicable:

               (A)  in the case of exercise by reason of the occurrence of an
                    Offer (as defined in section 6(f)(i)(A) or section
                    6(f)(ii)(A)(i) hereof), an amount equal to the Offer Spread
                    (as defined in section 6(g)(iv) hereof);

               (B)  in the case of exercise by reason of stockholder approval of
                    an agreement described in section 6(f)(i)(A)(ii) or section
                    6(f)(ii)(A)(iii) or (iv), an amount equal to the Merger
                    Spread (as defined in section 6(g)(vi) hereof);

               (C)  in the case of exercise by reason of an acquisition of
                    Common Stock described in section 6(f)(i)(A)(iii) or section
                    6(f)(ii)(A)(i) if other than pursuant to an Offer, an amount
                    equal to the Acquisition Spread (as defined in section
                    6(g)(viii) hereof); or

               (D)  in the case of exercise by reason of the change in
                    composition of the Board of Directors described in section
                    6(f)(i)(A)(iv) or section 6(f)(ii)(A)(ii), an amount equal
                    to the Spread (as defined in section 6(g)(ix) hereof).

               Notwithstanding the foregoing, in the case of a Limited Right
               granted in respect of an ISO, the holder may not receive an
               amount in excess of such amount as will enable such option to
               qualify as an ISO.

         (iii) The term "Offer Price per Share" as used in this section 6 shall
               mean, with respect to the exercise of any Limited Right by reason
               of the occurrence of an Offer, the greater of (1) the highest
               price per share of Common Stock paid in any Offer, which Offer is
               in effect at any time during the sixty-day period ending on the
               date on which such Limited Right is exercised, or (2) the highest
               Fair Market Value per share of the Common Stock during such
               sixty-day period.  Any securities or property which are part or
               all of the consideration paid for shares of Common Stock in the
               Offer shall be valued in determining the Offer Price per Share at
               the higher of (A) the valuation placed on such securities or
               property by the corporation, person or other entity making such
               Offer or (B) the valuation placed on such securities or property
               by the Committee.

          (iv) The term "Offer Spread" as used in this section 6 shall mean an
               amount 

                                         -11-



               equal to the product computed by multiplying (1) the excess of
               (A) the Offer Price per Share over (B) the option price per share
               of Common Stock at which the Related LSAR Option is exercisable,
               by (2) the number of shares of Common Stock with respect to which
               such Limited Right is being exercised.

          (v)  The term "Merger Price per Share" as used in this section 6 shall
               mean, with respect to the exercise of any Limited Right by reason
               of stockholder approval of an agreement described in section
               6(f)(i)(A)(ii) or in section 6(f)(ii)(A)(iii), the greater of (1)
               the fixed or formula price for the acquisition of shares of
               Common Stock specified in such agreement if such fixed or formula
               price is determinable on the date on which such Limited Right is
               exercised, and (2) the highest Fair Market Value per share of
               Common Stock during the sixty-day period ending on the date on
               which such Limited Right is exercised.

          (vi) The term "Merger Spread" as used in this section 6 shall mean an
               amount equal to the product computed by multiplying (1) the
               excess of (A) the Merger Price per Share over (B) the option
               price per share of Common Stock at which the Related LSAR option
               is exercisable, by (2) the number of shares of Common Stock with
               respect to which such Limited Right is being exercised.

         (vii) The term "Acquisition Price per Share" as used in this section 6
               shall mean, with respect to the exercise of any Limited Right by
               reason of an acquisition of Common Stock described in section
               6(f)(i)(A)(iii) or in section 6(f)(ii)(A)(i) if other than
               pursuant to an Offer, the greater of (1) the highest price per
               share shown on the Statement of Schedule 13D or amendment thereto
               filed by the holder of 25 percent or more of the Company's Common
               Stock which gives rise to the exercise of such Limited Right, and
               (2) the highest Fair Market Value per share of Common Stock
               during the sixty-day period ending on the date the Limited Right
               is exercised.

       (viii)  The term "Acquisition Spread" as used in this section 6 shall
               mean an amount equal to the product computed by multiplying (1)
               the excess of (A) the Acquisition Price per Share over (B) the
               option price per share of Common Stock at which the Related LSAR
               Option is exercisable, by (2) the number of shares of Common
               Stock with respect to which such Limited Right is being
               exercised.

          (ix) The term "Spread" as used in this section 6 shall mean, with
               respect to the exercise of any Limited Right by reason of a
               change in the composition of the Board described in section
               6(f)(i)(A)(iv) or in section 6(f)(ii)(A)(ii), an amount equal to
               the product computed by multiplying (1) the excess of (A) the
               highest Fair Market Value per share of Common Stock during the
               sixty-day period ending on the date the Limited Right is
               exercised over (B) the option price per share of Common Stock at
               which the Related LSAR Option is exercisable, by (2) the number
               of shares of Common Stock with respect to which the Limited Right
               is being exercised.

          (x)  Notwithstanding any other provision of the Plan, no Stock
               Appreciation Right granted hereunder may be exercised at a time
               when any Limited 

                                         -12-



               Right held by the holder of such Stock Appreciation Right may be
               exercised.
               
7.   Stock Awards

     Stock Incentives in the form of Stock Awards shall be subject to the
     following provisions:

     (a)  For the purposes of the Plan, in determining the value of a Stock
          Award, all shares of Common Stock subject to such Stock Award shall be
          valued at not less than 100% of the Fair Market Value of such shares
          on the date such Stock Award is granted, regardless of whether or when
          such shares are issued or transferred to the Key Employee and whether
          or not such shares are subject to restrictions which affect their
          value.

     (b)  Shares of Common Stock subject to a Stock Award may be issued or
          transferred to a Key Employee at the time the Stock Award is granted,
          or at any time subsequent thereto, or in installments from time to
          time, as the Committee shall determine.  Any amount payable in shares
          of Common Stock under the terms of a Stock Award may, at the
          discretion of the Company, be paid in cash on each date on which
          delivery of shares would otherwise have been made, in an amount equal
          to the Fair Market Value, on such date, of the shares which would
          otherwise have been delivered.

     (c)  A Stock Award shall contain such terms and conditions as the Committee
          shall determine with respect to payment or forfeiture of all or any
          part of the Stock Award upon termination of employment.

     (d)  A Stock Award shall be subject to such other terms and conditions,
          including, without limitation, restrictions on sale or other
          disposition of the Stock Award or of the shares issued or transferred
          pursuant to such Stock Award, as the Committee shall determine,
          provided, however, that upon the issuance or transfer of shares 
          pursuant to a Stock Award, the recipient shall, with respect to such
          shares, be and become a stockholder of the Company fully entitled to
          receive dividends, to vote and exercise all other rights of a
          stockholder except to the extent otherwise provided in the Stock
          Award.  Each Stock Award shall be evidenced by a written instrument in
          such form as the Committee shall determine, provided the Stock Award
          is consistent with the Plan and incorporates it by reference.

8.   Adjustment Provisions

     In the event that any recapitalization, or reclassification, split-up or
     consolidation of shares of Common Stock shall be effected, or the
     outstanding shares of Common Stock are, in connection with a merger or
     consolidation of the Company or a sale by the Company of all or a part of
     its assets, exchanged for a different number or class of shares of stock or
     other securities of the Company or for shares of the stock or other
     securities of any other corporation, or new, different or additional shares
     or other securities of the Company or of another corporation are received
     by the holder of Common Stock or any distribution is made to the holders of
     Common Stock other than a cash dividend, (a) the number and class of shares
     or other securities that may be issued or transferred pursuant to Stock
     Incentives, (b) the number and class of shares or other securities which
     have not been issued or transferred under outstanding Stock Incentives, (c)
     the purchase price to be paid per share under outstanding Options, and (d)
     the price to be paid per share by the Company or a Subsidiary for shares or
     other securities issued or transferred pursuant to Stock Incentives which
     are subject to a right of the Company or a  Subsidiary to reacquire such
     share or other securities, shall in each case be equitably adjusted.

9.   Term

                                         -13-



     The Plan shall become effective on the date it is approved by the
     stockholders of the Company.  No Stock Incentives shall be granted under
     the Plan after May 31, 1993.

10.  Administration

     (a)  The Plan shall be administered by a Committee which shall consist of
          not less than three directors of the Company designated by the Board
          of Directors, provided, however, that no director shall be designated
          as or continue to be a member of the Committee unless he shall at the
          time of designation and service be a "disinterested person" within the
          meaning of Rule 16b-3 under the Securities Exchange Act of 1934 (or
          any successor provision at the time in effect).  In no event shall a
          member of the Committee be eligible to be granted a Stock Incentive
          while serving on the Committee. Grants of Stock Incentives may be
          recommended or granted either in or without consultation with
          employees, but, anything in the Plan to the contrary notwithstanding,
          the Committee shall have full authority to act in the matter of
          selection of all Key Employees who are members of the Board  of
          Directors and in recommending Stock Incentives to be granted to them.

     (b)  The Board of Directors may delegate to the Committee any or all of its
          authority under the Plan, including the authority to award Stock
          Incentives, except its authority to amend or discontinue the Plan. 
          Any powers conferred on the Committee by this section 10 or by any 
          other provision of the Plan shall, to the extent such authority shall
          not have been so delegated by the Board of Directors, be exercised by
          the Board, provided, however, that with respect to the participation
          in the Plan of any director, unless his participation shall have been
          recommended by the Committee, a majority of the members of  the Board
          and a majority of its members acting in the matter shall, at the time
          so acting, be "disinterested persons" within the meaning of Rule 16b-3
          under the Securities Exchange Act of 1934 (or any successor provision
          at the time in effect).

     (c)  The Committee may establish such rules and regulations, not
          inconsistent with the provisions of the Plan, as it deems necessary to
          determine eligibility to participate in the Plan and for the proper
          administration of the Plan, and may amend or revoke any rule or
          regulation so established.  The Committee may make such determinations
          and interpretations under or in connection with the Plan as it deems
          necessary or advisable.  All such rules, regulations, determinations
          and interpretations shall be binding and upon their and respective
          legal representatives, beneficiaries, successors and assigns and upon
          all other persons claiming under or through any of them.

     (d)  Any action required or permitted to be taken by the Committee under
          the Plan shall require the affirmative vote of a majority of all the
          members of the Committee.  The Committee may act by written
          determination instead of by affirmative vote at a meeting, provided
          that any written determination shall be signed by all of the members
          of the Committee, and any such written determination shall be as fully
          effective as a majority vote at a meeting.  

     (e)  Members of the Board of Directors and members of the Committee acting
          under the Plan shall be fully protected in relying in good faith upon
          the advice of counsel and shall incur no liability except for gross 
          negligence or willful misconduct in the performance of their duties.

                                         -14-



11.  General Provisions

     (a)  Nothing in the Plan nor in any instrument executed pursuant thereto
          shall confer upon any employee any right to continue in the employ of
          the Company or a Subsidiary or shall affect the right of the Company
          or of a Subsidiary to terminate the employment of any employee with or
          without cause.

     (b)  No shares of Common Stock shall be issued or transferred pursuant to a
          Stock Incentive unless and until all legal requirements applicable to
          the issuance or transfer of such shares have, in the opinion of 
          counsel to the Company, been complied with.  In connection with any
          such issuance or transfer, the person acquiring the shares shall, if
          requested by the Company, give assurances satisfactory to counsel to
          the Company that the shares are being acquired for investment and not
          with a view to resale or distribution thereof and assurances in
          respect of such other matters as the Company or Subsidiary may deem
          desirable to assure compliance with all applicable legal requirements.

     (c)  No employee (individually or as a member of a group), and no
          beneficiary or other person claiming under or through him, shall have
          any right, title or interest in or to any shares of Common Stock
          allocated or reserved for the purposes of the Plan or subject to any
          Stock Incentive except as to such shares of Common Stock, if any, as
          shall have been issued or transferred to him.

     (d)  The Company or a subsidiary may, with the approval of the Committee,
          enter into an agreement or other commitment to grant a Stock Incentive
          in the future to a person who is or will be a Key Employee at the time
          of grant, and, notwithstanding any other provision of the Plan, any
          such agreement or commitment shall not be deemed the grant of a Stock
          Incentive until the date on which the Committee takes action to
          implement such agreement or commitment.

     (e)  In the case of a grant of a Stock Incentive to any employee of a
          Subsidiary, such grant may, if the Committee so directs, be
          implemented by the Company issuing or transferring the shares, if any,
          covered by the Stock Incentive to the Subsidiary, for such lawful
          consideration as the Committee may specify, upon the  condition or
          understanding that the Subsidiary will transfer the shares to the
          employee in accordance with the terms of the Stock Incentive specified
          by the Committee pursuant to the provisions of the Plan. 
          Notwithstanding any other provision hereof, such Stock  Incentive may
          be issued by and in the name of the Subsidiary and shall be deemed
          granted on the date it is approved by the Committee, on the date it is
          delivered by the Subsidiary, or on such other date  between such two
          dates, as the Committee shall specify.

     (f)  (i)  The Company or a Subsidiary may make such provisions as it may
               deem appropriate for the withholding of any taxes which the
               Company or Subsidiary determines it is required to withhold in
               connection with any Stock Incentive.
     
          (ii) With respect to any withholding tax obligation which may arise in
               connection with the exercise of a Nonqualified Stock Option, in
               connection with a disqualifying disposition of stock received
               upon the exercise of an Incentive Stock Option or in connection
               with the receipt of, or the lapse or termination of restrictions
               imposing a risk of forfeiture with respect to, a Stock Award, the
               Committee may, in its discretion and subject to such rules as the
               Committee may adopt, permit a Key Employee to satisfy, in whole
               or in part, such withholding tax obligation 

                                         -15-



               by electing to have the Corporation withhold from the shares of
               Common Stock to be issued upon exercise of the Nonqualified Stock
               Option, to be issued in connection with the exercise of an
               Incentive Stock Option, to be issued in connection with the grant
               of a Stock Award or released in connection with the lapse or
               termination of restrictions imposing a risk of forfeiture on all
               or a part of a Stock Award or by electing to deliver to the
               Corporation already-owned shares of Common Stock, in any case
               having a Fair Market Value, on the date such tax is determined
               under the Internal Revenue Code (the "Tax Date"), no greater than
               the amount necessary to satisfy the withholding amount due.  A
               Key Employee's election to have the Corporation withhold shares
               of Common Stock or deliver already-owned shares of Common Stock
               is irrevocable and is subject to the consent or disapproval of
               the Committee.

     (g)  No Stock Incentive and no rights under the Plan, contingent or
          otherwise, shall be assignable or subject to any encumbrance, pledge
          or charge of any nature except that, under such rules and regulations
          as the Committee may establish, a beneficiary may be designated in
          respect of a Stock Incentive in the event of the death of the holder
          of such Stock Incentive and except, also, that if such beneficiary
          shall be the executor or administrator of the estate of the holder of
          such Stock Incentive, any rights in respect of such Stock Incentive
          may be transferred to the person or persons or entity (including a
          trust) entitled thereto under the Will of the holder of such Stock
          Incentive or, in case of intestacy, under the laws relating to
          intestacy.
          
     (h)  Nothing in the Plan is intended to be a substitute for, or shall
          preclude or limit the establishment or continuation of, any other
          plan, practice or arrangement for the payment of compensation or
          fringe benefits to employees generally, or to any class or group of
          employees which the Company or any Subsidiary now has or may hereafter
          lawfully put into effect, including, without limitation, any
          retirement, pension, insurance, stock purchase, incentive compensation
          or bonus plan.
          
     (i)  The place of administration of the Plan shall conclusively be deemed
          to be within the State of Minnesota and the validity, construction,
          interpretation and administration of the Plan and of any rules and
          regulations or determinations or decisions made thereunder, and the
          rights of any and all persons having or claiming to have any interest
          therein or thereunder, shall be governed by, and determined
          exclusively and solely in accordance with, the laws of the State of
          Minnesota.  Without limiting the generality of the foregoing, the
          period within which any action arising under or in connection with the
          Plan must be commenced, shall be governed by the laws of the State of
          Minnesota, irrespective of the place where the act or omission
          complained of took place and of the residence of any party to such
          action and irrespective of the place where the action may be brought. 

12.  Amendment or Discontinuance of Plan

     (a)  The Plan may be amended by the Board of Directors at any time,
          provided that, without the approval of the stockholders of the
          Company, no amendment shall be made which

           (i) increases the aggregate number of shares of Common Stock that may
               be issued or transferred pursuant to Stock Incentives as provided
               in 

                                         -16-



               paragraph (a) of section 4,
               
          (ii) amends the provisions of paragraph (a) of section 10 with respect
               to eligibility and disinterest of a majority of members of the
               Board of Directors,
               
         (iii) permits any person who is not determined to be a Key Employee at
               the time to be granted a Stock Incentive,

          (iv) amends the provisions of paragraph (a) of section 5 or paragraph
               (a) of section 7 to permit shares to be valued or to be optional
               at less than 100% of Fair Market Value,
               
          (v)  amends section 9 to extend the term of the Plan, or

          (vi) amends this section 12.
               
     (b)  The Board of Directors may by resolution adopted by a majority of the
          entire Board of Directors discontinue the Plan.
          
     (c)  No amendment or discontinuance of the Plan by the Board of Directors
          or the stockholders of the Company shall adversely affect, without the
          consent of the holder, any Stock Incentive theretofore granted.
          

                                         -17-