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

 high and less than four 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, wit It- 

 three lenses, about one-third more. 



A thousand things about forest, field or garden, 

 afford objects of intense interest for daily study. 



Prof. ASA GRAY, of Harvard University, our 

 popular American Bntanist, says of it: <f You are 

 at liberty to call it the n GF^AY'S M.ici\pscopE," 

 I do not think anything better can be made for 

 the money." 



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



" three " - 2 50 



For Sale by 



IVISON, BLAKEMAN, TAYLOR & CO., 



138 & 140 Grand St., K. Y., f. O. Box, 1478, 

 133 <& 135 State St., Chicago, 



(Publishers of Gray's Botanies. 



