REVIEWS. 



Theoretical Principles of the Methods of Analytical Chemistry Based Upon 

 Chemical Reactions. By M. G. Chesneau, Ingenieur en Chef des Mines: 

 Professeur d'analyse minerale a 1'ecSle nationale des Mines. Authorized 

 Translation by Azariah Thomas Lincoln, Ph. D. Pp. vii+184. Price, $1.75 

 net. New York: Macmillan Company, 1910. 



This book is, as its name implies, a general discussion of the processes 

 of analytical chemistry viewed in the light of the more modern physico- 

 chemical theories. The first two chapters treat of the influence of the 

 physical state of precipitates upon their purification by washing, and 

 the theoretical principles involved in the processes based upon irreversible 

 reactions. The remainder of the book is a study of methods based upon 

 reversible reactions by double decomposition of salts, the electrolytic and 

 the thermodynamic theories of these reactions being compared by the 

 author who decidedly favors the latter. 



While hardly to be recommended as a text-book, this series of lectures 

 is well worth reading by teachers or investigators of analytical methods, 

 as it gives a rather broad insight into the subject as a whole. 



H. S. W. 



. Text-Book of Medical and Pharmaceutical Chemistry. By Elias H. Bartley, 

 B. S., M. D., Ph. G. Seventh edition. Pp. vi+734. Price, $3.00 net. Phila- 

 delphia: P. Blakiston's Son & Co., 1909. 



The seventh edition of this book includes some pages on very elementary 

 physics, together with a sketch of systematic crystallography followed by 

 General, Inorganic, Organic, and Physiological Chemistry. We believe 

 that the time has passed when it is necessary to teach physics to medical 

 students in this manner, as all schools fitted to graduate reasonably 

 trained physicians should require ample work in this subject before 

 admission to the colleges. It is difficult to see how a student can ade- 

 quately comprehend modern chemistry without such a knowledge. The 

 same statement applies to that portion of the book relating to General 

 Chemistry. 



The theories of solution and of ionization and the facts on which they 

 are based are treated so sparingly that the student can scarcely be 

 expected to be able subsequently to utilize this phase of the science. 



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