EXHIBIT A

Philip W. Goldsmith may,  through his position as Chairman of Goldsmith & Harris
Incorporated  ("G&H"),  a  broker-dealer  registered  under  Section  15 of  the
Securities  Exchange  Act of 1934 and an  investment  adviser  registered  under
Section 203 of the  Investment  Advisers Act of 1940, be deemed a control person
of G&H.

The amount of shares of common stock of 3D Systems  Corporation (the "Security")
beneficially  owned by Mr. Goldsmith which are not attributable to Mr. Goldsmith
by virtue of his position as Chairman of G&H amount to less than 1% of the total
outstanding shares of the Security.





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