Chemistry and Physics. 91 



3. Methods for Sugar Analysis and Allied Determinations ; 

 by Arthur Given. 8vo, pp. 75. Philadelphia, 1912 (P. Blakiston's 

 Son & Co.). — This is a valuable compilation of those methods 

 used for the analysis of sugars and similar materials which the 

 author has found from practical experience to be most useful and 

 accurate. Methods are given for the analyses required for the 

 control of cane and beet sugar manufacture ; for the examination 

 of maple products, honey, glucose and sugars in various food 

 products ; and for dextrin and starch. There are several illustra- 

 tions of special forms of apparatus and a number of valuable 

 tables. 



It would seem that the avowed intention of the author to make 

 plain the way for the inexperienced might have been well served 

 by a few pages of general introductory matter setting forth the 

 principles of sugar analysis ; the opening paragraphs seem like a 

 rather cold plunge for an inexperienced analyst. The book espe- 

 cially commends itself by giving straightforward directions for 

 the analysis of each material, avoiding a confusing array of alter- 

 nate methods. a. l. d. 



4. Laboratory Exercises in Physical Chemistry ; by J. N. 

 Pring. 12mo, pp. 162. Univ. of Manchester Publications (Long- 

 mans, Green & Co.), 1911. — This book gives excellent directions 

 for the usual determinations and there is enough theory 

 included to make the object of the experiments clear. It is pos- 

 sibly a little one-sided, as more than half is devoted to electro- 

 chemistry and electrolytic experiments. Since physico-chemical 

 measurements are usually carried on only by somewhat advanced 

 students, it would be an advantage to have more references to the 

 original literature than are given. h. w. f. 



5. Die EntdecJcung des Radiums; by Mme. Curie. Pp. 

 28, with 5 figures. Leipzig, 1912 (Akademische Verlagsgesell- 

 schaft m. b. H.). — This pamphlet is the authorized German 

 edition of the address made in Stockholm on December 11, 1911, 

 by Marie Curie on the occasion of the presentation to her of the 

 Nobel prize for chemistry. The paper deals primarily with the 

 history of the discovery of radium and with the importance to 

 chemistry of the final isolation of radium in the elementary form. 



h. s. u. 



6. Tiber neuere thermodynamische Theorien (JVernstsches 

 Wdrmetheorem and Quantenhypothese) ; by Dr. Max Planck. 

 Pp. 34. Leipzig, 1912 (Akademische Verlagsgesellschaft m. 

 b. H.). — This is a formal reproduction of a lecture delivered, on 

 December 16, 1911, before the German Chemical Society. For 

 details suggested by the parenthetical title reference must be 

 made to the original article. h. s. u. 



7. Studies in Terrestrial Magnetism; by C. Chree. Pp. 

 xii, 206, with 43 figures and 74 tables. London, 1912 (Macniil- 

 lan and Co., Ltd.). — The object of this book is made very clear 

 by the author, who says : — " The volume does not aim at being a 

 text-book of Terrestrial Magnetism, or at summarising existing 



