'UCCESSFUL Text and Reference Books that you 

 ' want in your library and in your classes. 



OPTIC PROJECTION 



SIMON HENRY GAGE, Professor Emeritus of Histology and Embry- 

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



Cornell University. 



This is a very comprehensive work dealing fundamentally and prac- 

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

 ing Lantern and the Moving Picture Machine. Library Binding. 

 730 pages. Over 400 figures. - Postpaid, $3.00 



HANDBOOK OF MEDICAL ENTOMOLOGY 



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

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

 fessor oi Biology, Cornell University. 



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

 and their allies, 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. Send for 

 sample pages'. Price, $2.20 Postpaid 



THE MANUAL FOR THE STUDY OF INSECTS 



J. H. COMSTOCK, 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 pa^es. 



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 Natui-al Science Literature. Well 

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



Postpaid, $1.50 



X;jE HANDBOOK OF NATURE-STUDY 



A. B. C' 'MSTOCK, Assistant Professor of Nature Study, Cornell 

 Univel^-?^. 



The M>-^, extensively used Nature-Study text before the public. 

 Cver 2>^li;ssons on common birds, animals, insects, plants, trees, stars 

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

 1,000 il'^ -*^';ations. Send for circular. 



I -xibund in one vol., $3.25 Net, mailing weight, 5 lbs. 

 j'.oundintwovols., 4.00 Net, mailing weight, 5| lbs. 



I ; For sale at all book stores or shipped direct from 



THE SiMSTOCK PUBLISHING COMPANY, Ithaca, N. Y, 



