// is attached to a box, one and a half inches 

 high and less than foiir inches long, into which 

 it is neatly folded when not in use. The needles 

 are used for dissecting flowers, or other objects, 

 too small to be otherwise handled for analysis. 

 The lenses magnify about fifteen diameters ; or, 

 with three lenses, about one-third more. 



A thousand things about forest, field or garden, 

 afford objects of intense interest for daily study. 



Prof. ASA GRA Y, of Harvard University, 

 our popular American Botanist, says of it : "You 

 are at liberty to call it the 'GRAY'S MICROSCOPE/ 

 / do not think anything better can be made for 

 the money? 



Price of Microscope, with two Lenses, - $2 00 

 " " three " 250 



For Sale by 



IVISON, BLAKEMAN, TAYLOR & Co., 



,N. Y., P. O. Box 1478. 



Publishers of GRAY'S BOTANIES. 



