62 Scientific Intelligence. 



highly interesting as an example of the refinement of the work 

 of Richards in atomic weight determinations. — Berichte, xxxix, 

 3612. h. l. w. 



4. Qualitative Analysis, by William Conger Morgan, Svo, 

 pp. 351. New York, 1906 (The Macmillan Company. Price 

 Si. 90 net). — This text-book has been prepared for nse in teach- 

 ing qualitative analysis during freshman year in college. The 

 course presupposes good chemical training in secondary schools. 

 The first, or general part, of about 60 pages, is devoted to such 

 theoretical matters as have a bearing upon qualitative analysis, 

 including ionization. The second part, of about 175 pages, 

 gives an extensive description of qualitative reactions. The 

 elements in this part are arranged strictly according to the order 

 of Mendeleeff's periodic system, which makes it very in conve- 

 nient for reference in connection with the analytical groups. 

 There are some useful tables here showing the formula, color, 

 character, and solubility of each of the commoner salts of 

 sodium, potassium, silver, and barium. The third part, syste- 

 matic analysis, occupies about 90 pages, and is mostly tabular 

 in its arrangement, with notes or discussions on the pages facing 

 the tables. The methods appear to be generally well chosen for 

 the purpose in view. The use of the terms "basic analysis " 

 and " acid analysis" in this part is hardly in keeping with the 

 modern aspect of the terms usually employed. The book as a 

 whole may be praised as showing many good features, but the 

 reviewer cannot read with patience such spellings as " oxid," 

 "iodin" and "sulfid," for they lead to the mispronunciation of 

 these English words. h. l. w. 



5. A History of Chemistry, by F. P. Armitage, 12mo, pp. 

 259. London, 1906 (Longmans, Green & Co.). — This is an ably 

 written book dealing iargely with the development of chemical 

 theories. It is adapted for the use of the student of chemistry 

 rather than for that of the general reader. In all cases, where 

 possible, authorities have been made to tell their own story. The 

 nomenclature and notation used are those of the times described. 

 The work is to be highly recommended to serious students of 

 chemistry who wish to grasp the problems that have been pre- 

 sented and solved in the past. h. l. w. 



6. A History of Chemistry, by Ernst von Meter. Trans- 

 lated by George McGowan, 8vo, pp. 691. London and New 

 York (Macmillan Company. Price 84.25 net). — This is the third 

 English, translated from the third German edition, of a well 

 known and valuable work which is well worthy of the attention, 

 not only of chemists, but of all who are interested in the devel- 

 opment of science. The English text has had the advantage of 

 the author's revision, and contains various additions not found in 

 the corresponding German edition. h. l. w. 



1. Absorption of Light. — Two investigators, working with 

 similar apparatus, publish papers on this subject. The paper by 

 Ernst Muller is entitled Absorption of Light in Solutions, and 



