SECURITIES AND EXCHANGE COMMISSION

                             Washington, D. C. 20549

                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported): May 17, 1999



                          MOLECULAR DEVICES CORPORATION
             (Exact name of registrant as specified in its charter)


                                    Delaware
                 (State or other jurisdiction of incorporation)



         0-27316                                          94-2914362
(Commission File No.)                          (IRS Employer Identification No.)



                               1311 Orleans Drive
                           Sunnyvale, California 94089
              (Address of principal executive offices and zip code)



       Registrant's telephone number, including area code: (408) 747-1700


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         This Current  Report on Form 8-K contains  forward  looking  statements
that involve risks and  uncertainties  relating to the  acquisition by Molecular
Devices Corporation,  a Delaware corporation  ("Molecular Devices"),  of Skatron
Instruments AS, a Norwegian  company  ("Skatron"),  and certain of the assets of
Skatron  Instruments,  Inc. a Virginia  corporation  and  former  subsidiary  of
Skatron,  including  the risks:  inherent in  acquiring  a company in  Skatron's
industry  (e.g.   assumption  of  known  and  unknown   liabilities,   including
environmental  liabilities);  that the  synergies  expected  to result  from the
acquisition  described  below  might  not  occur as  anticipated;  the risk that
integration of the companies will be difficult;  and that management's attention
might be  diverted  from  day-to-day  business  activities.  Actual  results and
developments may differ  materially from those described in this Current Report.
For more information  about Molecular Devices and risks relating to investing in
Molecular Devices, refer to Molecular Devices's most recent report on Form 10-K.

Item 2.  Acquisition or Disposition of Assets.

         On May 17, 1999,  Molecular Devices acquired Skatron by the acquisition
of all of the outstanding capital stock of Skatron from Helge Skare, Wiel Skare,
Steinar  Faanes  and  Sten  Skare,   each  an  individual   resident  in  Norway
(collectively,  the "Sellers"), and acquired certain assets (accounts receivable
and inventory) from Skatron  Instruments,  Inc. The acquisition was accomplished
pursuant  to a Stock  and Asset  Purchase  Agreement  dated as of May 17,  1999,
between  and  among  Molecular  Devices,  the  Sellers,   Skatron,  and  Skatron
Instruments,   Inc.  (the  "Purchase   Agreement").   In  connection   with  the
acquisition,  Molecular  Devices paid $6,818,000  million in exchange for all of
the shares of Skatron  capital stock  outstanding  on May 17, 1999. The purchase
prices were  arrived at through  arms-length  negotiations,  and was paid out of
internally generated funds. Of the amount paid for the shares of Skatron capital
stock, $600,000 is being held in escrow for six months to secure the obligations
of certain of the Sellers to indemnify Molecular Devices for any breaches of the
representations  and warranties of those Sellers made in the Purchase Agreement.
The acquisition will be accounted for as a purchase.

         Skatron, designs, develops, manufactures and markets a complete line of
microwell  plate washers and other related  tools,  including  cell  harvesters,
focused  on  the  drug  discovery  and  high-throughput  screening  marketplace.
Molecular  devices  currently  intends to  maintain  Skatron  as a  wholly-owned
subsidiary  located  in Norway  and to have  Skatron  continue  to  conduct  its
business as historically conducted.

                  A copy of the press release announcing the consummation of the
acquisition  is attached  hereto as Exhibit 99.1 and  incorporated  by reference
herein.


Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

         (a)   Financial Statements of Businesses Acquired.

         Not applicable.

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         (b)   Pro Forma Financial Information

         Not applicable.

         (c)   Exhibits.

     Exhibit No.  Description
     -----------  -----------
     2.1          Stock and Asset Purchase Agreement,  dated as of May 17, 1999,
                  among Molecular Devices Corporation,  a Delaware  corporation,
                  Helge Skare,  Wiel Skare,  Steinar Faanes and Sten Skare, each
                  an individual  resident in Norway,  Skatron  Instruments AS, a
                  Norwegian company, and Skatron  Instruments,  Inc., a Virginia
                  corporation  (the  Disclosure  Schedule  has been  omitted  as
                  permitted  pursuant  to  the  rules  and  regulations  of  the
                  Securities  and  Exchange  Commission  ("SEC"),  but  will  be
                  furnished supplementally to the SEC upon request).

     2.2          Escrow  Agreement,  dated as of May 17, 1999,  among Molecular
                  Devices Corporation, a Delaware corporation, Helge Skare, Wiel
                  Skare and Greater Bay Trust Company, as Escrow Agent.

     4.1          Reference is made to Exhibits 2.1 and 2.2.

     99.1         Press release announcing the consummation of the acquisition.


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                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.



                                      MOLECULAR DEVICES CORPORATION



Dated:  May 25   , 1999               By:  /s/ Timothy H. Harkness
                                         ---------------------------------------
                                           Timothy H. Harkness
                                           Vice President of Finance
                                           and Chief Financial Officer



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                                  EXHIBIT INDEX


Exhibit No.       Description
- -----------       -----------

     2.1          Stock and Asset Purchase Agreement,  dated as of May 17, 1999,
                  among Molecular Devices Corporation,  a Delaware  corporation,
                  Helge Skare,  Wiel Skare,  Steinar Faanes and Sten Skare, each
                  an individual  resident in Norway,  Skatron  Instruments AS, a
                  Norwegian company, and Skatron  Instruments,  Inc., a Virginia
                  corporation  (the  Disclosure  Schedule  has been  omitted  as
                  permitted  pursuant  to  the  rules  and  regulations  of  the
                  Securities  and  Exchange  Commission  ("SEC"),  but  will  be
                  furnished supplementally to the SEC upon request).

     2.2          Escrow  Agreement,  dated as of May 17, 1999,  among Molecular
                  Devices Corporation, a Delaware corporation, Helge Skare, Wiel
                  Skare and Greater Bay Trust Company, as Escrow Agent.

     4.1          Reference is made to Exhibits 2.1 and 2.2.

     99.1         Press release announcing the consummation of the acquisition.