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 libVary buckrura, 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 tea-!iers 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, $4.23 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, $s. 



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 laooratory. 472 pages. 265 figures. Postpaid, $3.00. 



THE LIFE OF INLAND WATERS 



A Text-Book of Fresh Water Biology. 



JAMES G. NEEDH.-\M, 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 o: the wing-veins of insects 

 Royal octavo. 430 pages. Illustrated. Price, §3-75 net. 



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