Journal op Entomology and Zoology — Advertising Section 



GAGE — The Microscope 



An Introduction to Microscopic Methods and to Histology 



By SIMON H. GAGE. 

 Twelfth edition in press. Entirely rewritten, und with many new illustrations. 

 Price $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. 8vo. 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. NEEDHAM, Professor of Limnology and General Biology in 

 Cornell University. Cloth 8vo. XIV.-f542 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 8vo. XVni.+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 



By 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 disease-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 8vo. Nearly 375 pages. Price $2.00 net. 



The Comstock Publishing Company 



Cornell Heights, Ithaca, N. Y. 



