DISSECT! NG MICROSCOPES 
of ee style and price, suited 
ll kinds of work 
A new series of. lenses 
for dissecting work have 
recently been perfected by 
us which have unusually 
long working distance and 
: eS large flat field. These 
ee ieee ee eee ee. lenses are offered at 
prices less than any lenses of equal quality heretofore 
in use. The new Dissecting Stands are all nickeled 
metal with glass stage. ~ Catalog free. 
Sample copy JOURNAL OF APPLIED MICROSCOPY on request, 
BAUSCH & LOMB OPTICAL CO. 
NEW YORK OFFICE: CHICAGO OFFICE: 
25th Street and Broadway, ROCHESTER, N. Y. State and Washington Streeta, 
Townsend Bldg. Stewart Bldg. 
PUBLICATIONS OF THE UNIVERSITY OF PENNSYLVANIA 
SYLLABUS OF LECTURES ON THE 
VERTEBRATA. 
By the late Proressor E. D. COPE. 
With Introduction by HENRY FAIRFIELD OSBORN, Sc.D. 
Svo. Cloth, $1.25; paper, $1.00. 
BOSTON, GINN & COMPANY, AGENTS 
IMPORTANT PERIODICAL PUBLICATIONS 
JOURNAL OF MORPHOLOGY. 
Edited by C. O. eet Samenika of aein, University of Chicaga 
Crown 8vo. Three numbers a volume oo to 150 pages each, yes oe from 
five to ten double iithográphić “plate. Subse ription price, $9.00 per volume 
single copy, $3.50. 
ZOOLOGICAL BULLETIN. 
Under the copies = of Professors C. O. WHITMAN and W. M. W a ae 
ssisted by a number of collabora tors: a price, $3.00 per volume 
of six eibere; single —- A A aaa ach. 
GINN & COM PANY, PUBLISHERS, 
9-13 TREMONT PL ACE, BOSTON. 
