xxxviii 
NATURAKISTS’ QUARTERLY ADVERTISER. 
Microscopes, 
Magnifying Glasses, 
Insect Pins,* 
Telescopes, 
Spy Glasses, 
Field Glasses, 
Mathematical Instruments, 
Magic Lanterns, 
Philosophical Apparatus, 
JAMES W. QUEEN & Co., 
924 Chestnut St., Philadelphia. 
CATALOGUES SENT ON APPLICATION . 
Part 1st: Mathematical Instruments 162 pages; 2nd: Optical Instruments 186 pages; 
3rd: Magic Lanterns 150 pages; 4th: Philosophical Apparatus 188 pages. 
THE GARDENER’S MONTHLY AND HORTICULTURIST, 
Edited by THOMAS MEEHAN, 
and published at $2.10 per year, gives full instructions in the science and 
practice of every branch of gardening. It will pay any one to> subscribe 
for it. Our friends and customers may send their subscriptions through 
us, and we will forward them to publisher. 
GEO. A. BATES, 
Salem, Mass, 
Tie American lontily licrorcopical Journal, 
an authoritative and reliable periodical for Naturalists, Medical Students, 
Practicing Physicians, and all persons who use the microscope, or who 
desire to read of its revelations. 
Editor and Publisher, KOMYN HITCHCOCK, F. K. M. S., 
General dealer in American and Foreign scientific books and periodicals. 
51 & 53 UVCA-IIDElNr LANE, 
NEW YORK CITY, 
