GRAY'S 



BOTANIST'S MICROSCOPE. 



This Convenient Instrument, devised and manti^ 

 factured first for the use of the Students in 



HARVARD UNIVERSITY, 



has given so great satisfaction there, and else- 

 where, that we deem it a duty to make it better 

 known, and offer it at a price within the reach 

 of all Students. 



