52 Scientific Intelligence, 



The work is a very useful one for the purpose of reference 

 to what has been done in atomic weight determinations, and 

 it will be a valuable aid to future workers in this field. Chem- 

 ists should be grateful to the author for the prodigious amount 

 of labor and the careful study that he has devoted to its prepa- 

 ration. — Memoirs Nat. Acad, of Sciences, Vol. 16, Third Memoir. 



H. L. w. 



2. The Fundamental Processes of Dye Chemistry; by Hans 

 Edward Fierz-David ; Translated bv Frederick A. Mason. 8vo, 

 pp. 240. London, 1921 (J. and A. Churchill).— This is the 

 English translation of an important Swiss work on the prac- 

 tical side of dye chemistry. The book gives very full details 

 for the laboratory preparation of many important intermediate 

 products and dyes, and in connection with these descriptions 

 there are interesting notes on the technique and practice of the 

 factories. There are 49 excellent illustrations, including 19 

 plates, shoAving laboratorj^ and factory apparatus. The book 

 gives in a separate section a general discussion of various tech- 

 nical details, including vacuum distillations, the construction 

 and use of autoclaves, structural materials, works management, 

 and the calculation of costs. A section is devoted also to analy- 

 tical details. 



The book appears to be a very excellent one for the use of 

 students of dye manufacture, both as a guide for laboratory 

 work and a w^ork of reference. It should be very interesting 

 also to other students of organic chemistry as it well displays 

 the high degree of perfection to which organic synthesis has 

 been brought in this highly developed chemical industry, 



H. L. w. 



3. Organic Chemistry for the Laboratory ; by W. A. Noyes. 

 8vo, pp. 293. Easton, Pa. 1920 (The Chemical Publishing 

 Company). — This is the fourth edition, in which there are but 

 few changes in comparison with the last issue of four years ago. 

 As is well known, the book is an extensive laboratory manual 

 for organic preparations including preliminary chapters on ulti- 

 mate organic analysis and general operations, and a final chapter 

 on the qualitative examination of carbon compounds. The pro- 

 cesses are clearly described and there are abundant references to 

 the literature in connection with them. The first edition of this 

 book appeared in 1897, and it is evident from the frequency with 

 which new editions have been issued that the book is extensively 

 used. H. L. wr. 



4. Qualitative Chemical Analysis; bv M. Cannon Sneed. 

 8vo, pp. 198. New York, 1921 (Ginn and Company).— This 

 text-book has been prepared by the head of the division of gen- 

 eral inorganic chemistry in the University of MinYiesota. Its 

 presentation of the subject differs very much from the usual 

 methods. A large part of the text is devoted to a decidedly 



