Exhibit 10.10

                              LAMINAIRE CORPORATION




AUGUST 11, 1999                                               $200,000

                          8% INSTALMENT PROMISSORY NOTE



         SL Group, Inc., a Nevada corporation, (the "Company"), for value
received, hereby promises to pay to Laminaire Corporation or registered assigns
(the "Holder") instalment payments on the payment days set forth below (the
"Maturity Date"), at the principal offices of the Company, in such coin or
currency of the United States of America as at the time of payment shall be
legal tender for the payment of public and private debts, and to pay interest on
the outstanding principal sum hereof at eight percent (8%) per annum from the
date hereof until the Company's obligation with respect to the payment of such
principal sum shall be discharged as herein provided. Interest hereunder shall
accrue and shall be payable on each instalment date, in like coin or currency to
the Holder hereof at the office of the Company as hereinafter set forth. In the
event that for any reason whatsoever any interest or other consideration payable
with respect to this Note shall be deemed to be usurious by a court of competent
jurisdiction under the laws of the State of New York or the laws of any other
state governing the repayment hereof, then so much of such interest or other
consideration as shall be deemed to be usurious shall be held by the holder as
security for the repayment of the principal amount hereof and shall otherwise be
waived.

         The Note shall be payable in 12 equal quarterly instalments commencing
on March 31, 2000. In the event that SL Group, Inc. satisfies any obligation on
behalf of Laminaire Corporation. The amount of such obligation shall, at SL
Group's option, be used to reduce its obligation under this Note in a manner to
be determined by The SL Group.

         1. Prepayment

                  a. The principal amount of this Note may be prepaid by the
Company, in whole or in part, without premium or penalty, at any time, provided,
the Company gives the Holder not less than 10 days prior written notice of such
prepayment (which notice shall set forth the amount and date of such
prepayment).



                  b. .Upon any prepayment of a portion of the principal amount
of this Note, all accrued, but unpaid, interest on such portion of the principal
shall be paid to the Holder on the date of prepayment.

         2. Covenants of Company

                  a. The Company covenants and agrees that, so long as this Note
shall be outstanding, it will:

                           (i) Promptly pay and discharge all lawful taxes,
assessments and governmental charges or levies imposed upon the Company or upon
its income and profits, or upon any of its property, before the same shall
become in default, as well as all lawful claims for labor, materials and
supplies which, if unpaid, might become a lien or charge upon such properties or
any part thereof; provided, however, that the Company shall not be required to
pay and discharge any such tax, assessment, charge, levy or claim so long as the
validity thereof shall be contested in good faith by appropriate proceedings,
and the Company shall set aside on its books adequate reserves with respect to
any such tax, assessment, charge, levy or claim so contested.

                           (ii) Do or cause to be done all things necessary to
preserve and keep in full force and effect its corporate existence, rights and
franchises and comply with all laws applicable to the Company as its counsel may
advise;

                           (iii) At all times maintain, preserve, protect and
keep its property used and useful in the conduct of its business in good repair,
working order and conditions, and from time to time make all needful and proper
repairs, renewals, replacements, betterments and improvements thereto, so that
the business carried on in connection therewith may be properly and
advantageously conducted at all times;

                           (iv) At all times keep true and correct books,
records and accounts.

         3. Events of Default

                  a. This Note shall become due and payable upon written demand
made by the Holder hereof if one or more of the following events, herein called
"events of default", shall happen and be continuing:

                           (i) Default in the payment of the principal and
accrued interest on this Note, when and as the same shall become due and
payable, whether by acceleration or otherwise;


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                           (ii) Default in the due observance or performance of
any covenant, condition or agreement on the part of the Company to be observed
or performed pursuant to the terms hereof, if such default shall continue
uncured for 30 days after written notice, specifying such default, shall have
been given to the Company by the Holder; provided, however, that the grace
period specified in this Section 3(a)(ii) shall not apply to any other Event of
Default specified in this Section 3.

                           (iii) Entry of a judicial order for the appointment
of a receiver, trustee or liquidator for the Company or its property which order
shall not have been vacated or set aside or otherwise terminated within 120 days
or upon the Company consenting to the entry of such an order;

                           (iv) Admission in writing of the Company's inability
to pay its debts as they mature;

                           (v) General assignment by the Company for the benefit
of creditors;

                           (vi) Filing by the Company of a voluntary petition in
bankruptcy or a petition or an answer seeking reorganization, or an arrangement
with creditors;

                           (vii) Entering against the Company of a court order
approving a petition filed against it under the federal bankruptcy laws, which
order shall not have been vacated or set aside or otherwise terminated within
120 days;

                  b. The Company agrees that notice of the occurrence of any
event of default will be promptly given to the Holder at his or her registered
address by certified mail within five days of such event of default.

                  c. In case any one or more of the events of default specified
above shall happen or be continuing, the Holder may proceed to protect and
enforce his or her right by suit for the specific performance of any covenant or
agreement contained in this Note or in aid of the exercise of any power granted
in this Note or may proceed to enforce the payment of this Note or to enforce
any other legal or equitable rights of such Holder.

         4. Miscellaneous

                  a. The Company may consider and treat the person in whose name
this Note shall be registered as the absolute owner hereof for all purposes
whatsoever (whether or not this Note shall be overdue) and the Company shall not
be affected by any notice to the contrary. Subject to the limitations herein
stated, the registered owner of this Note shall have the right to transfer this
Note by assignment, and the transferee thereof shall, upon his registration as
owner of this Note, become vested with all the powers and rights of the
transferor. Registration of any new owner

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shall take place upon presentation of this Note to the Company at its principal
offices, together with a duly authenticated assignment. In case of transfer by
operation of law, the transferee agrees to notify the Company of such transfer
and of his address, and to submit appropriate evidence regarding the transfer so
that this Note may be registered in the name of the transferee. This Note is
transferable only on the books of the Company by the Holder hereof, in person or
by attorney, on the surrender hereof, duly endorsed. Communications sent to any
registered owner shall be effective as against all Holders or transferees of the
Note not registered at the time of sending the communication.

                  b. Payments of interest shall be made as specified above to
the registered owner of this Note. Payment of principal shall be made to the
registered owner of this Note upon presentation on or after maturity. No
interest shall be due on this Note for such period of time that may elapse
between the maturity of this Note and its presentation for payment.


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                  c. Notice of dishonor, protest, presentment and notice of
protest are hereby waived. In the event an action, suit or proceeding is brought
to enforce this Note or to protest the same, the Holder hereof shall be entitled
to all costs and disbursements, including reasonable attorney's fees and costs
of collection, incurred in connection with such action, suit or proceeding.

                  d. Upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this Note,
and (in the case of loss, theft or destruction) of reasonably satisfactory
indemnification, and upon surrender and cancellation of this Note, if mutilated,
the Company shall execute and deliver a new Note of like tenor and date. Any
such new Note executed and delivered shall constitute an additional contractual
obligation on the part of the Company, whether or not this Note so lost, stolen,
destroyed or mutilated shall be at any time enforceable by anyone.

                  e. This Note shall be construed and enforced in accordance
with the laws of the State of New York. Any litigation based thereon, or arising
out of, under, or in connection with, this Note or any course of conduct, course
of dealing, statements (whether oral or written) or actions of the Company or
Holder shall be brought and maintained exclusively in the court of the state of
New York without reference to its conflicts of laws rules or principles. The
Company and the Holder hereby expressly and irrevocably submits to the exclusive
jurisdiction of the Federal Courts of the state of New York sitting in the
Southern District for the purpose of any such litigation as set forth above and
irrevocably agrees to be bound by any final judgment rendered thereby in
connection with such litigation.

                  f. No recourse shall be had for the payment of the principal
or interest of this Note against any incorporator or any past, present or future
stockholder, officer, director or agent of the Company or of any successor
corporation, either directly or through the Company or any successor
corporation, or otherwise; all such liability of the incorporators,
stockholders, officers, directors and agents being waived, released and
surrendered by the Holder hereof by the acceptance of this Note.


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         IN WITNESS WHEREOF, SL GROUP, INC. has caused this Note to be signed in
its name by its President on the 11th day of August, 1999.

                                      SL GROUP, INC.


                                      By:  /s/ Edward A. Heil
                                         --------------------------------
                                         Edward A. Heil, PRESIDENT


                                      LAMINAIRE CORPORATION


                                      By:  /s/ Peter Daniele
                                         -------------------------------
                                         Peter Daniele, Chief Financial Officer


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