SCIENCE-ADVERTISEMENTS 



^^ Humanized Science *^ 



is tufiai a. rcoieli^er calls 



An Introduction to Science 



By BERTHA M. CLARK, Ph.D., Head of 

 Science Department, William Penn High 

 School, Philadelphia. 494 pages. Price, $1.20 



"Dr. Bertha Clark has attempted, 

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 the pupils in their home life and out- 

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 and the author attempts to organize 

 these problems and their solutions so 

 as to leave the pupils with a scientific 

 point of view of their problems and 

 their solution. Hence we have an 

 introdnotion to science of a kind likely 

 to be of great value to the pupil." 



AMERICAN BOOK COMPANY 



New York Cincinnati Chicago 



Country 

 Life 



Education 

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Edited by CHARLES WILLIAM BDRKETT, Editor 

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653 pages. S2.25 

 Types and Breeds of Farm Animals 

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563 pages, illustrated. $2.00 

 Principles and Practice of Poultry 

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611 pages, illustrated. S2.50 

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492 pages, illustrated, partly in color. J2.00 



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LIFE INSURANCE FOR PROFESSORS 

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Assiatant Professor of Mathematics and Insurance 



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A timely study of a question of interest to all 



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Price, paper 25 cents 



UuTcrutT of Califomis Press Berkeley, Califomis 



Methods in Plant Histology 



Third Revised Edition — Illustrated 

 By Chahleb J. Chambeblain 

 Complete directions for collecting and preparing plant mater- 

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 new book. 

 326 pages, cloth. $2.25, postage extra (weight 2 lbs. 2 oz.) 



THE UNIVERSITY OF CHICAGO PRESS 

 CHICAGO ILUNOIS 



For Teachers and Students 



NEWT BOOKS 



"Ezamplet is Alterastiiii-CiirrcDts," in Leather $2.40 



"How to Make Low-Presinre Trssiformera," 40o 



"How to Make Hish-Preuara TraDtformen," 65o 



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OPTIC PROJECTION 



Principles, installation and use of the Mag'o Lantern, Opaque 

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SenJ for ctescriptt\>e circulars and sample 

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PRINCIPLES OF 



STRATIGRAPHY 



BY 



AMADEUS W. GRABAU, S.M.. S.D. 



PROFESSOR OF PALAEOhJTOLOGY IN 

 COLUMBIA UNIVERSITY 



Large Octavo, 1150 pages, with 254 illustrations in the tczL 

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