BECK’S MICROSCOPES. 
R. & J. BECK, 
Manufacturing Opticians, 
NO. 1016 CHESTNUT STREET, PHILADELPHIA, PA., 
Offer the cheapest and most complete stock IN the world, of Microscopes and 
Magnifiers , suited to the wants of 
The Botanist, The Entomologist, The Mineraloiist, The Physician, 
Or any other Investigator, from the simplest Pocket Magnifier, at 40c., to 
the most elaborate Compound Microscope, at $1500.00. 
OUR ILLUSTRATED CONDENSED PRICE LIST WILL BE MAILED 
TO ANY ADDRESS FREE. 
Our Elaborate Illustrated Catalogue, of 156 pages, will be sent on re- 
ceipt of Ten Cents, or three Stamps. 
MENTION WHEIiE YOU SAW THIS. 
