SCIENCE—ADVERTISEMENTS 



TOLMAN 



Theory of the Relativity 

 of Motion 



With Appendix 



A supplement to this work, written by the 

 author, has just been issued. Under the 

 title, 



Relativity Theories in Physics 



this Appendix gives a general description 

 of the nature of relativity theories, to- 

 gether with brief discussions of Tolman's 

 theory of similitude or relativity of size, 

 of Einstein's theory of the relativity of 

 uniform motion, and of Einstein's theory 

 of gravity and general relativity. 



ix-|-242 pages (including Appendix). 

 Cloth, $1.75. Carriage extra. Weight, 

 1^ pounds. 



Appendix only (paper), 25 cents. 



The University of California Press 



BERKELEY, CALIFORNIA 



New type double walled Thelco Oven 



Automatically controlled. 



Moderately priced so that no Laboratory 

 need be without one. 



Write for Descriptive Literature 

 Manufactured by 



The Thermo Electric Instrument Co. 



8 Johnson Street NEWARK, N. J. 



A NEW BLAKISTON BOOK 



WILDER 



A Laboratory Manual of 

 Anthropometry 



By HARRIS H. WILDER, Ph.D., 



Professor of Zoology, Smith College, 



Northampton, Mass. 



43 Illustrations. Cloth, $3.00. 



" To the measures accepted by inter- 

 national agreement, the author adds a 

 convenient and useful list of general 

 skeletal measures as well as angles and 

 indices . . . his enumeration of instru- 

 ments and description of the manner in 

 which they are employed, are done with 

 a thorough knowledge of the difficulties 

 which beset the beginner. . . . Wilder's 

 Manual is recommended for its lucidity 

 and conciseness." — ^^Science. 



P. BLAKISTON'S SON & CO., Philadelphia 



