Chemistry and Physics. 479 



pany. Price, $1.25). — This text-book is designed for the use 

 of students who have had no previous instruction in chemistry, so 

 that it gives a considerable amount of instruction in fundamental 

 facts and theories. It may be expected, however, that, with suit- 

 able omissions, it will be useful for students who have had a 

 training in general chemistry. The book appears to be an excel- 

 lent one in many ways. The numerous experiments are well 

 chosen and usually so arranged that the student draws his own 

 conclusions. The treatment of the subject is modern as well as 

 clear and interesting. Some of the practical subjects discussed 

 are fuels, illuminants, hard water, fats, soaps, textile fibers, 

 bleaching, and dyeing, while much attention is given to foods. 

 A striking feature is the introduction of a number of full-page 

 portraits, comprising those of Mrs. Ellen S. Richards, Robert 

 Boyle, Berzelius, Dalton, Mayow, Priestley, Lavoisier, Rum ford, 

 Black, Arrhenius, Emil Fischer and W. O. At water. Each of the 

 portraits is accompanied by a biographical note. h. l. w. 



5. A Popular Treatise on the Colloids in the Industrial Arts, 

 by Kurt Arndt. Translated from the Second, Enlarged, Ger- 

 man Edition, by Nahum E. Katz. 8vo, pp. 73. Easton, Pa., 

 1914 (The Chemical Publishing Co.). — This little book gives an 

 interesting account of the subject indicated by the title. Defini- 

 tions of the technical terms are given, and the general principles 

 relating to colloids are briefly discussed. Then the important 

 bearings of these substances in a great variety of industries are 

 described. The book contains much that will be of interest to 

 chemists, especially to those whose line of work or study is in the 

 industrial side of the science. The English of the translator, 

 while usually clear, is not entirely free from the complications 

 of German construction and idiom, and there is occasionally a 

 mis-translation, as, for example, when in two instances it appears 

 that the German word Leim, meaning glue, is rendered as 

 " lime," which has the same sound, but a very different meaning, 

 except in an obsolete sense. h. l. w. 



6. The Fixation of Atmospheric Nitrogen, by Joseph Knox. 

 12mo, pp. 110. New York, 1914 (D. Van Nostrand Company. 

 Price, 75c.). — This "Chemical Monograph" gives an account of 

 this very interesting and important recen-t development of 

 chemical industry. It deals especially with the theoretical aspects 

 of the processes, and it is divided into three principal sections : 

 Fixation of atmospheric nitrogen as nitric and nitrous acids, or 

 as their salts ; synthesis of ammonia and ammonium compounds 

 from atmospheric nitrogren ; conversion of atmospheric nitrogen 

 into compounds which readily yield ammonia. The work is a 

 very satisfactory one, and the references to the literature of the 

 subject are particularly extensive and useful. h. l. w. 



7. Lehrbuch der physikalischen Chemie ; by Karl Jellinek. 

 Yol. I. Pp. xxxvi, 732, with 81 tables, 253 text-figures, 4 por- 

 traits. Stuttgart, 1914 (Ferdinand Enke). — Since the only com- 

 prehensive text-book on general physical chemistry, by W. 



