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                                  EXHIBIT 4.2

                                 AMENDMENT TO 
                               REXON INCORPORATED
                             1992 STOCK OPTION PLAN



         The 1992 Stock Option Plan of Rexon Incorporated (the "Plan") is
hereby amended as follows:

         1.      The first sentence of Subsection 5.1 is hereby deleted in its
entirety and the following sentence is substituted in its place:

         "Subject to the provisions of Section 12 (relating to adjustments upon
         changes in stock), the shares which may be sold pursuant to options
         granted under the Plan shall not exceed in the aggregate 1,700,000
         shares of the Company's authorized Common Stock."

         2.      Subsection 11.1 of the Plan is hereby deleted in its entirety
and the following Subsection is substituted in its place:

         "11.1   If a holder of an Option who is either an employee of or
         consultant to the Company shall voluntarily or involuntarily leave the
         employ of or cease to render consulting services to the Company or any
         Subsidiary, the Option of such holder shall terminate, except that,
         subject to the limitation hereafter stated in this Section 11, (i) if
         his termination results from any reason other than his death, he may
         at any time within three months after termination of his services (or
         such longer period, not to exceed five (5) years, as may be approved
         by the Board of Directors of the Committee) exercise his Option but
         only to the extent that it was exercisable by him on the date of
         termination and only in the absence of the circumstances set forth in
         Section 11.2 below; (ii) if he is re-hired or retained as an employee
         of or consultant to the Company within eighteen (18) months after his
         termination, his Option may, if approved by the Board of Directors or
         the Committee, be reinstated and again becomes exercisable in
         accordance with its original terms (but if his Option was originally
         an Incentive Option it shall be reinstated or reissued only as a
         Non-qualified Option); and (iii) if he dies while in the employ of or
         as a Consultant to the Company or a Subsidiary, or within three months
         after termination of his employment or his consulting services, his
         Option may be exercised by the person or persons to whom his rights
         under the Option shall pass by will or by the laws of descent or
         distribution, provided such exercise is effectuated within two (2)
         years following the date of





                                       
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Amendment to Rexon Incorporated
1992 Stock Option Plan

         death.  In no event may an Option be exercised to any extent by anyone
after the expiration of its term."

         3.      A new sentence is hereby added to the end of Subsection 3.1
                 and shall read in full as follows:

         "Notwithstanding anything to the contrary contained herein, the Chief
         Executive Officer of the Company shall have the sole and exclusive
         discretionary authority to grant stock options on behalf of the
         Company and the Board of Directors to newly-hired employees of the
         Company and any of its subsidiaries (other than persons who are hired
         as officers and would be subject to the reporting requirements under
         Section 16 of the Securities Exchange Act of 1934); provided, however,
         that the CEO shall not grant options under this authority to any one
         new employee in excess of 25,000 shares nor in any fiscal quarter in
         excess of 100,000 shares in the aggregate and, provided further, that
         options granted to new hires by the CEO pursuant to this authority
         shall be granted within the first thirty (30) days following the date
         of employment with the Company."

         4.      In all other respects, except as expressly amended herein, the
                 Plan is hereby ratified and confirmed in its entirety.

         The amendments to the Plan herein set forth have been approved by the
Board of Directors and are deemed effective as of November 4, 1993, except as
to the amendments to Subsection 5.1 and Subsection 11.1, which shall become
effective upon shareholder approval.

                                          BY ORDER OF THE BOARD OF DIRECTORS:
 


                                          By   /s/ IRVIN R. REULING          
                                             -------------------------------
                                             Irvin R. Reuling



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