SCIENCE-ADVERTISEMENTS 



Laboratory Problems 

 in Civic Biology 



By GEORGE W. HUNTER, A.M., 



Head of the Department of Biology, Dewitt 

 Clinton High School, New York City. 



283 pages, $0.80. 



TTHESE 249 problems are largely in 

 the nature of experiments to be 

 performed in tbe laboratory with ordi- 

 nary equipment; many of them, how- 

 ever, are to be worked out at home or 

 during field trips. 



Each exercise contains a concise state- 

 ment of the problem it offers, a list 

 of required materials, directions for 

 the pupil's observations and questions 

 bringing out the point of the problem. 

 Designed for use with "A Civic Biology" 



AMERICAN BOOK COMPANY 



New York Cincinnati Chicago 



Barker and 

 Young's 



Manual of Soil Physics 



From the teaching standpoint, 

 the exercises and material in this 

 new manual are very effectively 

 arranged for agricultural courses 

 requiring the field and laboratory 

 method of instruction. The ex- 

 ercises have been developed and 

 tested by experts, insuring 

 methods at once complete and 

 practical ; while flexibility has 

 been gained through the publica- 

 tion of the manual in looseleaf 

 form. 



44 pages, with blank pages for notes, 

 in Biflex Binder, 65 cents 



Ginn and Company 



Boston New York Chicago 

 London 



Neurological Technique 



By IRVING HARDESTY 



196 pages, SI. 75, postage extra, (wt. 1 lb. 8 oz.) 



An introduction and laboratory guide to the study 

 of the architecture of the nervous system, containing 

 a succinct account of methods which have stood the 

 test of practical application. 



"The instructions are thoroughly practical." 



— British Medical Journal. 

 '* We know of no similar book which will be as valuable to 

 the student of neurological technique." 



— American Journal of Insanity. 



Dir. S3316 



The University of Chicago Press 



Chicago, Illinois 



NEW BOOK 



EXAMPLES IN MAGNETISM, postpaid in flexible 

 leather, $1.10. 



For High Schools and Colleges, for Students of 

 Physics and Engineering, Maximum Educational 

 Value. 

 Remit amount to: Prof. F. E. AUSTIN, 



Box 441, Hanover, N. H. 



OPTIC PROJECTION 



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

 Lantern. Projection Microscope and Moving Pictxire Machine; 

 700 pages, 400 figs. By Simon Henht Gage, B.S., and 

 Henbt Phelps Gage, Ph.D. Postpaid, S3.00. 

 THE COMSTOCK PUBLISHING CO., Ithaca,N Y. 



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PRINCIPLES OF 



STRATIGRAPHY 



BY 



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



PROFESSOR OF PALAEONTOLOGY IN 

 COLUMBIA UNIVERSITY 



Large Octavo, 1150 pages, with 254 illustrations in the text. 

 Cloth bound, price, $7.50. 



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