Chemistry and Physics. 515 



product of about 3 g. which showed no spectroscopic differences 

 from caesium, and also showed the same atomic weight. At the 

 soluble end the final mother liquor showed the presence of 

 thallium, as well as lithium, sodium, potassium and rubidium. 

 No indication was found of the presence of an unknown element 

 with caesium in pollucite. — Zeitschr. anorgan. u. allgem. Chem., 

 1915. h. l. w. 



3. Experimental Organic Chemistry ; by James F. Norris. 

 12mo, pp. 315. New York, 1915 (McGraw-Hill Book Co.). First 

 editiou. — This book is designed primarily to be used as a labora- 

 tory guide in connection with courses in organic chemistry in 

 which the student follows in the laboratory the subject as devel- 

 oped in the class-room. Directions for experiments illustrating 

 the preparation and chemical properties of all the more important 

 classes of organic compounds are given.. These are very com- 

 plete and cover several subjects which in many laboratory courses 

 receive scant attention, for example, fatty amines, hj-droxyacids, 

 carbohydrates and proteins. Special attention is given to labora- 

 tory technique and the handling of small quantities of material. 

 Those properties of a compound which lead to its identification 

 are particularly emphasized. As the companion book for " The 

 Principles of Organic Chemistry" by the same author, this book 

 should prove especially valuable. n. a. shepaed. 



4. Laboratory Experiments in Organic Chemistry ; by E. P. 

 Cook. 12mo, pp. 50. Philadelphia, 1915 (P. Blakiston's Son & 

 Co.). — These experiments, which are especially designed for use 

 with Stoddard's "Introduction to Organic Chemistry," constitute 

 the laboratory course in this subject given at Smith College, and 

 are intended to require five to six hours per week for one semester 

 for their completion. The preparations are representative and 

 the numerous test-tube experiments well chosen to illustrate the 

 chemical behavior of the various compounds, as well as to give 

 considerable practice in laboratory technique. K". a. shepard. 



5. The Elements of .Physical Chemistry; by Harry C. Jones. 

 8vo, pp. vii, 672, 4th ed., revised and enlarged. New York, 

 1915 (Macmillan Co.). — In the fourth edition of this well-known 

 text book, some new material has been added, chiefly, however, 

 at the end of chapters, so that the plan of the book has not been 

 changed. This method at times makes statements from former 

 editions a little misleading. For instance, in a list of the " most 

 recent measurements of thermochemistry" (p. 358) the date of 

 the latest reference is 1904. The additions are well chosen and 

 add very materially to the value of the book. h. w. f. 



6. Alcoholometric Tables; by Sib Edward Thorpe. 12mo, 

 pp. 91. New York, London, 1915 (Longmans, Green and Co.). 

 — The numbers in these tables are printed in large, clear 

 type and are very convenient for reference. The tables are an 

 extension of those given in the author's " Dictionary of Applied 

 Chemistry.'.' Table I gives the percentages by weight and vol- 

 ume of ethyl alcohol corresponding to specific gravities at 



Am. Jour. Sci. — Fourth Series, Vol. XL, No. 239. — November, 1915. 

 35 



