X- 



REFERENCE BOOKS 



For the Library 



MEDICAL ENTOMOLOGY 



Wm. A. Riley and 0. A. Johannson 



A handbook of disease carrying insects and their allies, with tables 

 for determining the species. A valuable book. 



340 pages. Illustrated. Cloth $2.00 



THE MANUAL FOR THE STUDY OF INSECTS 



John Henry Comstock 



The leading college text and high school reference book on the 

 subject. Is written so that inexperienced teachers and students 

 can find out the principal characteristics of an}' family of insects 

 occurring in Canada and the United States. 



1 6th edition ready. 



750 pages. 700 illustrations. $4.25, postage on 4 lbs. 



LIFE OF INLAND WATERS 



Needham and Lloyd 



A presentation of the scientific aspects of fresh-water biology and 

 its relation to the economic, civic, aesthetic and physical interests of 

 man. The only book on the subject in the English language. 



438 pages. Illustrated. Postpaid $3.00 



GENERAL BIOLOGY 



James G. Needham 



The most widely used modern text. A concise presentation of the 

 phenomena of living things, their structure, functions, modes of repro- 

 ductions, inheritance, etc. Written so you can understand it. 



500 pages. Illustrated. Postpaid $2.50. 



Canadian Representatives 



McClelland & Stewart, Ltd. 



Toronto, Ont. 



The Comstock Publishing Co. 



ITHACA, NEW YORK, U. S. A. 



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