Scientific & Technical Instruments

                                     BY-LAWS
                                       OF
                              DADE MICROSCAN, INC.

                             A DELAWARE CORPORATION


                                    ARTICLE I

                                     OFFICES

     SECTION 1.  REGISTERED OFFICE.  The registered office of the corporation in
the State of Delaware shall be located at Corporation Trust Center, 1209 Orange
Street, in the City of Wilmington, County of New Castle. The name of the
corporation's registered agent at such address shall be the Corporation  . . .

                                     BY-LAWS
                                       OF
                               DADE FINANCE, INC.

                             A DELAWARE CORPORATION


                                    ARTICLE I

                                     OFFICES

          SECTION 1.  REGISTERED OFFICE.  The registered office of the
corporation in the State of Delaware shall be located at Corporation Trust
Center, 1209 Orange Street, in the City of Wilmington, County of New Castle. The
name of the corporation's registered agent at such address shall be the
Corporation  . . .

                                     BY-LAWS

                                       OF

                       CHIMERA RESEARCH AND CHEMICAL, INC.


                                    ARTICLE I

                                     OFFICES

     The principal office of the corporation shall be located at 90 Venice
Circle, City of Land O'Lakes, State of Florida. The corporation may have such
other offices, either within or without the State of Florida, as the board of
directors may designate or as the business of the corporation may require from
time to time.

     The registered office of  . . .

                           RHEOMETRIC SCIENTIFIC, INC.

                            (a Delaware corporation)




                                     BYLAWS

















                           As adopted on May 30, 2000







================================================================================




<PAGE>


                                TABLE OF CONTENTS


                                                                        Page

ARTICLE I              STOCKHOLDERS.......................................14
     . . .