HANDBOOK OF MEDICAL ENTOMOLOGY 
WILLIAM. A. RILEY, Ph. D., Professor of Insect Morphology and Parasitology, Cornell 
University, and O. A. JOHANNSEN, Ph. D., Professor of 
Biology, Cornell University. 
A concise account of poisonous, parasitic and disease-carrying insects and their allies, in- 
cluding descriptions and illustrations of the principal species, with keys for their determination, 
and methods of control . Bound in library buckrum, medium 8vo. 348 pages. Price, $2.00 net. 
A MANUAL FOR THE STUDY OF INSECTS 
JOHN HENRY COMSTOCK, Professor of Entomology, Emeritus, 
Cornell University. 
This handbook is designed to meet the needs of teas ers in the public schools and of 
students in high schools and colleges. The book is so written that any intelligent teacher can 
find out for himself the more important facts of insect life. Includes tables for identifying any 
family of insects of North America. The leading school and college text. 700 pages. 800 
figures. Price, $4.25 net. 
OPTIC PROJECTION 
SIMON HENRY GAGE, Professor of Histology and Embryology, Emeritus, Cornell 
University, and HENRY PHELPS GAGE, Ph. D., 
Cornell University. 
This is a very comprehensive work, dealing fundamentally and practically with the Magic 
Lantern, the Projection Microscope, the Reflecting Lantern, and the Moving Picture Machine. 
730 pages. Over 400 figures. Postpaid, $5. 
THE MICROSCOPE 
(13th Revised Edition Ready) 
SIMON HENRY GAGE, Professor of Histology and Embryology, Emeritus, 
Cornell University. 
An authoritative, up-to-date guide for everyone who uses the microscope and for every 
beginner who wishes to use the microscope intelligently and effectively. Should be in every 
school and college laboratory. 472 pages. 26s figures. Postpaid, $3.00. 
THE LIFE OF INLAND WATERS 
A Text-Book of Fresh Water Biology. 
JAMES G. NEEDHAM, Pd, D., Professor of Limnology and General Biology 
in Cornell University, and JOHN T. LLOYD, A. B., Assistant in 
Limnology in Cornell University. 
This book is a broad presentation of the field of fresh-water biology, primarily in its 
scientific aspects, also in relation to commercial, civic, aesthetic and public health interests of 
man. There is no book in the English language covering the field. Copiously illustrated with 
photographs from nature. 438 pages. 244 figures. Price, $3.00. 
THE WINGS OF INSECTS 
JOHN HENRY COMSTOCK. Professor of Entomology, Emeritus, 
Cornell University. 
This volume is an exposition of the uniform terminology of the wing-veins of insects 
Royal octavo. 430 pages. Illustrated. Price, $ 3-75 net. 
SEND FOR ILLUSTRATED CIRCULARS 
For Sale at all Bookdealers or Sent Direct from 
THE COMSTOCK POBUSHING COMPANY 
ITHACA, NEW YORK, U. S. A. 
