REVIEW 



A Handbook | of | Colloid-Chemistry ; The recognition of colloids, the | 

 theory of colloids, and their | general physico-chemi- | cal properties 

 S by | Dr. Wolfgang Ostwald | Privatdozent in the University of 

 Leipzig j second English edition | translated from the third German 

 edition | by | Dr. Martin H. Fischer j professor of physiology in the 

 University of Cincinnati j with numerous notes added | by | Emil 

 Hatschek | Cass Institute, London j with 63 illustrations | Phila- 

 delphia | P. Blakiston's Son & Co. | 1012 Walnut Street. Cloth, 

 pp. i-xvi + 1-284, $3.50 net 



Due principally to the rapidly increasing realization of the 

 importance of colloid chemistry in various fields, especially 

 in the practical applications of chemical science, the scarcity of 

 textbooks on this subject has been felt. This new English edi- 

 tion of Wolfgang Ostwald's standard work will undoubtedly 

 meet a ready reception. While not so much as might be wished 

 has been added since 1912 (a thorough revision being impos- 

 sible on account of the war), the results of some recent work, 

 particularly of Hatschek's own researches on the physical prop- 

 erties of colloids, have been included. 



A brief introduction includes the methods for recognition of 

 colloids, their classification into suspensions and emulsoids, and 

 the determination of their electric charge. Part I is a presenta- 

 tion of the theory of colloids, and includes chapters on their 

 constitution, general properties, and energy relations. The 

 present conception of colloid chemistry as a science dealing with 

 surface-energy relations of a condition (the colloid state) which 

 is very common, and in which any substance may be, is con- 

 trasted with the original view that the subject dealt only with 

 a few glue-like substances. Part II takes up in detail the phys- 

 ical properties of colloids, such as vapor tension, viscosity, 

 Brownian movement, and diffusibility. 



The book is well suited for a text or a reference book for 

 those whose work is related to the subject of colloids. 



G. A. P. 



167853 6 491 



