The present study attempts only in part to accomplish this aim, 

 being no more than a preliminary compilation of the scientific 

 instruments known to have been used during the first two centuries 

 of American colonial existence. It merely attempts to assemble 

 all the data that is presently available in scattered sources, and 

 to organize it in a usable form for the student and historian of 

 x'\merican science. A supplement relating to 19th-century instru- 

 ments and instrument makers is in progress. 



The most that is hoped for the present work is that it will be 

 of temporary assistance, serving to bring forth additional informa- 

 tion on the subject from sources not previously available or known. 



February 1, J 964 S.A.B. 



Xll 



