

NEW CATALOG * MICROTOMES 
Containing full descriptions 
and Photographic Illustrations 
of our entire line of remodeled 
microtomes and accessories, 
including several 
NEW MICROTOMES 
This new series is the most 
complete and practical ever 
listed, and every user of a 
Microtome should have a 
copy of the book for refer- 
ence purposes, if for no 
other reason.  Mailed free. 
Bausch & Lomb Optical Co. 
New York ROCHESTER, N. Y. Chicago 






Bergen's Foundations of Botany 3 ‘ . s . ° . $1.50 
Davis' Physical Geography 1.25 
Moore's Laboratory Directions due P AP in n Bacteriology 1.00 
Blaisdell’s Practical Physiology $ . 1.10 
Brown's Physiology for the Carai z . . . ` 5 
Ward's Exercises in Meteorology . à . è . . . 1.12 
Davis’ Elementary Meteorology . ‘ ^ . . è . . 2.50 
Williams' Elements of Chemistry « ; ; s ° . 1.10 
"Hastings and Beach's General iiim . $ è 3 s à page 
Wentworth and Hill’s Physics : Rer ea r os pp 
Gage’s Principles of Physics 2 e Rc. v. UN pe 
Stone's Experimental Physics * UT Neu Wade LE 
Young's General Astronomy é ; ; : ; 
Byrd’s Laboratory Manual in Astronomy é ^ ; = š ap 
Upton’s Star Atlas . : . > : ° . * 
GINN à COMPANY PUBLISHERS 
Boston New York Chicago San Francisce 
Atlanta Dalias Columbus Londo 

