Second Hand Microscopes 



At far below regular price. 



I RECOMMEND THE FOLLOWING AS 

 SUITABLE FOR BOTANICAL WORK: 



MICROSCOPE by Newton, London ; full size, all brass, inclination 

 joint; rack and pinion and fine adjustments; good achromatic dividing 

 objective, giving powers of about 30 and 75; in case, $10.00 



Or, with addition of a 1-5 inch achromatic lens, giving powers of 

 about 30, 75 and 280, $13.00 



Beck '* Scholar's " Microscope, with draw tube and fine adjust- 

 ment; inclination joint; good 1 inch achromatic objective (B. & L.); 

 powers about 60 to 100; in case $6.00 



Or, with addition of a 1-5 inch achromatic lens, giving powers 

 about 60 to 100 and 300 to 500, $9.00 



Send for Bulletin of Second-h&nd Microscopes and Cameras, just issued 



EDWARD PENNOCK, PffilXsSrWfX 



The Fern Book 



Prepare for another season's collect- 

 ing by getting a copy of "Our Ferns 

 in Their Haunts." No person living 

 east of the Rocky Mountains can fail 

 to identify the ferns of his locality if 

 he has this book. The illustrations, 

 alone, are sufficient for identification 

 but the text is so full and so clear as 

 to dispel any doubts that may arise. 

 It has the only illustrated key ever 

 published. There are 225 illustrations 

 and 340 pages of text. Sent postpaid 

 for $2.15. With a year's subscription 

 to this magazine for $2.50. 



Address 



Willard N. Glute & Co. 



Joliet, III. 



Trade Marks 

 Designs 

 Copyrights Ac. 



Anyone sending a sketch and description may 

 quickly ascertain our opinion free whether an 

 invention is probably patentable. Communica- 

 tions strictly confidential. HANDBOOK on Patents 

 sent free. Oldest agency for securing patents. 



Patents taken through Munn & Co. receive 

 special notice, without c harg e, in the 



Scientific American. 



A handsomely illustrated weekly. Largest cir- 

 culation of any scientific journal. Terms, $3 a 

 year ; four months, $1. Sold by all newsdealers. 



MUNN & Co. 361Broad " a ^ New York 



Branch Office, 625 F St., Washington, D. C. 



