Journal op Entomology and Zoology — Advertising Section 
GAGE — The Microscope 
An Introduction to Microscopic Methods and to Histology 
By SIMON HENRY GAGE, Professor of Histology and Embryology Emeri- 
tus, Cornell University. Eleventh Edition, 375 pages; 265 Illustrations. 
Postpaid $2.00. 
This work aims to give help to everyone who uses the microscope, whether 
he is a beginner or an advanced worker. 
COMSTOCK— A Manual for the Study of Insects 
By JOHN HENRY COMSTOCK, Professor of Entomology in Cornell Uni- 
versity, and ANNA BOTSFORD COMSTOCK, member of the Society of 
American Wood-Engravers. Svo. cloth, IX. + 701 pages, 797 figures in the 
text, and six full page plates. Nearly all of the figures were engraved 
especially for this work. Postpaid $4.07; net $3.75. 
This hand-book is designed to meet the needs of teachers in the public 
schools and of students in high schools and colleges. 
NEEDHAM— General Biology 
A book of outlines and practical studies for the general student 
By JAMES G. NEEUHAM, Professor of Limnology and General Biology in 
Cornell University. Cloth Svo. XIV.+542 pages; 288 figures, mostly 
original. Postpaid $2.00. 
This book is expressly designed to help the general student obtain a com- 
prehensive grasp of the principles of biology. 
COMSTOCK— Handbook of Nature-Study 
By ANNA BOTSFORD COMSTOCK, Lecturer in Nature-Study in Cornell 
University. Cloth Svo. XVIII. -f 938 pages, more than 1,000 illustrations. 
Prices, postpaid: Bound in one volume, $3.65; bound in two volumes, 
$4.50; Volume I., including Animal Life, $2.25; Volume II., including 
Plant Life, $2.25. Sample pages sent on application. 
A handbook of Nature-Study for teachers and parents, based on the Cornell 
Nature-Study Leaflets, with much additional material and many new illustra- 
tions. 
GAGE — Optic Projection 
By SIMON HENRY GAGE, Professor Emeritus of Histology and Em- 
bryology in Cornell University, and Henry Phelps Gage, Ph. D. 
This work of over 700 pages and with over 400 figures is of especial inter- 
est to workers in all fields of Biology in that it deals especially with the use of 
the Projection Microscope for demonstrations and for drawing. It also gives 
the fundamental principles of all the forms of projection. A 16-page circular 
will be sent on request. Postpaid, $3.00. 
RILEY — Handbook of Medical Entomology 
Bv WM. A. RILEY, Ph. D., Professor of Insect Morphology and Para- 
"sitology in Cornell University and O. A. JOHANNSEN, Ph. D., Pro- 
fessor of Biology in Cornell University. 
A concise account of poisonous, and diseasa-carrying insects and their 
allies, including descriptions and illustrations of the principal species, with 
keys for their determination, and method of control. Bound Library Buckram, 
medium Svo. Nearly 375 pages. Price $2.00 net. 
The Comstock Publishing Company 
Cornell Heights, Ithaca, N. Y. 
