SCI 



1 3 1921 ' 



New Series 

 Vol. LIII, Mo. 



Friday, June 10, 1921 





Single Copies, 15 Cts, 

 Annual Subscription, S6.00 



Philosophy And The Ne\ 



Discussion of The Relativity Theory and The 1 % 



l> 



hysics 



if Quanta 



By Louis Rougier, Professeur Agrege De Philosophie, Doc 4 Lettres. Au- 

 thorized Translation from the Author's Corrected '. ^ ^y Morton 

 Masius, M.A., Ph.D., Professor of Physics, Worcester P, <i ^c Institute; 

 Translator of M. Planck's "Theory of Radiation." i2mo, '\ '59 Pages. 

 Cloth, $i.J5 Postpaid. \ '^■ 



The recent remarkable developments of physical theories, especially those 

 concerned with relativity and quanta of energy, cannot fail to have far-reaching 

 influences on philosophical thought. Professor Rougier's very wide reading in 

 mathematical and experimental physics has enabled him to present and interpret 

 . the new advances in physics in a way which should prove of great interest to 

 both philosopher and physicist. The book marks a measurable advance toward 

 a confluence of the broad streams of philosophical and scientific enquiry. 



Chemical Reactions And Their Equations 



The General Principles of Balancing Equations 



By Ingo W. D. Hackh, Ph.C, A.B., Professor of Biochemistry, College of Physi- 

 cians and Surgeons, San Francisco. i2mo, viii -\- 138 Pages. Cloth, $1.75 

 Postpaid. 



A detailed study of this volume will enable anyone to balance any chemical 

 equation rapidly and correctly. 



Introduction To General Chemistry 



An Exposition of the Principles of Modern Chemistry 



By H. CoPAUX, Professor of Mineral Chemistry, School of Industrial Physics 

 and Chemistry, Paris. Translated by and with Appendix by Henry 

 Leffmann, A.M., M.D., Member American Chemical Society and of the 

 British Society of Public Analysts. 30 Illustrations, i2mo, x -t- 195 Pages. 

 Cloth, $2.00, Postpaid. 



A new presentation of the fundamental laws of the atom and of chemical 

 affinity calculated to clarify all difficulties. 



P. Blakiston's Son & Co., Publishers, Philadelphia 



