'UCCESSFUL Text and Reference Books that you 

 ' want in your library and in your classes. 



OPTIC PROJECTION 



SIMON HENRY GAGE, Professor Emeritus of HLstology and Embry- 

 ology, Cornell University, and HENRY PHELPS GAGE, Ph.D., 



Cornell University. 



This is a very comprehensive work dealing fundamentally and prac- 

 tically with the Magic Lantern, the Projection Microscope, the Reflect- 

 ing Lantern and the Moving Picture 'Machine. Library Binding. 

 730 i)ages. Over 400 figures. Postpaid, $3.00 



HANDBOOK OF MEDICAL ENTOMOLOGY 



WM. A. RILEY, Ph.D., Professor of Insect Morphology and Para- 

 sitology, Cornell University and O. A. JOHANSEN, Ph.D., Pro- 

 fessor of Biology, Cornell University. 



A concise account of poisonous, parasitic and disease-carrjang insects 

 and their alUes, including descriptions and illustrations of the principal 

 species, with keys for their determination, and methods of control. 

 Bound in Library Buckram, medium 8vo. 350 + VIII pages. Fend for 

 sample pages. Price, $2.20 Postpaid 



THE MANUAL FOR THE STUDY OF INSECTS 



J. H. COMSTOGK, Professor Emeritus of Entomology, Cornell Uni- 

 versity. 

 For past 20 years and still the leading college text. Now rapidly 



going into schools as a reference guide to insect study. 700 pages. 



700 illustrations. Mailing weight, 4 lbs. $3.75 Net 



THE NATURAL HISTORY OF THE FARM 



J. G. NEEDHAM, Professor of Entomology, Cornell University. 



A recent successful addition to Natural Science Literature. Well 

 arranged for class work and for private study. 300 pages. Illustrated. 



Postpaid, $1.50 



THE HANDBOOK OF NATURE-STUDY 



A. B. COMSTOGK, Assistant Professor of Nature Study, Cornell 

 University. 



The most extensively used Mature-Study text before the pubUc. 

 .Over 200 lessons on common bu'ds, animals, insects, plants, trees, stars 

 and the weather worked out in detail for teachers and pupils. 950 pages. 

 1,000 illustrations. Send for circular. 



Bound in one vol., $3.25 Net, mailing weight, 5 lbs. 

 Bound in two vols., 4.00 Net, mailing weight, 5| lbs. 



For sale at all book stores or shipped direct from 



THE COMSTOCK PUBLISHING COMPANY, Ithaca, N. Y. 



