254 



SCIENCE 



[N. S. Vol. L. No. 1289 



Smith and H. M. Mess (Henry Holt & Co.), 

 on the other hand, is out of the ordinary. The 

 authors combine with the directions for ex- 

 perimentation a large amount of interesting 

 information, much of which is not to be found 

 in the ordinary text-books, but which should 

 serve to awaken scientific curiosity and stim- 

 ulate interest in the work itself. The scheme 

 of instruction as laid down is exacting and 

 calls for teaching of a high order. "Whether 

 or not one cares to adopt the procedure as a 

 whole, the book will be found to be full of 

 helpful suggestions and well worth study. 



In the field of organic chemistry, the well- 

 known " Organic Chemistry for Advanced 

 Students" of Professor J. B. Cohen (Long- 

 mans, Green & Co.) appears in a second 

 edition, in which the material formerly 

 included in two volumes is divided into 

 three, dealing, respectively, vnth "Reactions," 

 " Structure " and " Synthesis," with the pur- 

 pose of grouping together to better advantage 

 allied siibjects and aSording a more logical 

 sequence. The rearrangement of the subject 

 matter has given opportimity to bring the 

 material up to date, and the new voliunes seem 

 to fully maintain the standard of the earlier 

 edition as one of the notable works on organic 

 chemistry. The book is written for advanced 

 students and is not designed to have the sort 

 of completeness which belongs to a work of 

 reference, although these volumes will be 

 found valuable in that respect as well. Pro- 

 fessor Cohen had also prepared somewhat 

 earlier a " Class-book of Organic Chemistry " 

 (The Macmillan Co.) designed for medical 

 students, and others who are not intending to 

 make chemistry a profession, which merits 

 attention as a carefully planned and simplified 

 course. 



Professor J. T. Stoddard's "Introduction to 

 Organic Chemistry" (P. Blakiston's Son & 

 Co.) has appeared in a second edition and 

 Professor E. P. Cook has prepared a little 

 manual entitled "Laboratory Experiments in 

 Organic Chemistry " to accompany it. Both 

 are characterized by a simplicity and direct- 

 ness of statement which is welcomed by 



Among the text-books on analytical chem- 

 istry which have appeared during the last few 

 years are to be found several new editions of 

 weU-known works. These include a fom-th 

 English edition of Treadwell-HaU's "Analyt- 

 ical Chemistry, Volume II., Qualitative Anal- 

 ysis " (John Wiley & Sons), a standard au- 

 thority; a sixth edition of A. A. Noyes' 

 " Qualitative Analysis " (The Macmillan Co.), 

 a manual based upon what is, perhaps, the 

 most painstaking and thorough series of in- 

 vestigations ever undertaken as a background 

 for the perfection of analytical procedures; 

 and a second edition of Mahin's " Quantitative 

 Analysis " (McGraw-Hill Book Co.), a manual 

 which has already received deserved recogni- 

 tion. A less familiar manual which is in its 

 second edition is that by Edmund Knecht 

 and Eva Hibbert, entitled "New Reduction 

 Methods in Volumetric Analysis " (Longmans, 

 Green & Co.). It is of the nature of a mono- 

 graph, dealing almost wholly with the applica- 

 tions of titanous chloride as a quantitative 

 reducing agent. Other recent works in their 

 first editions include an " Elementary Quali- 

 tative Analysis" by Professors Dales and 

 Bamebey (John Wiley & Sons), a straight- 

 forward presentation of the subject, but with- 

 out striking features ; " Methods in Metal- 

 lurgical Analysis," by Professor C. H. White, 

 a work of somewhat uneven merit (D. Van 

 Nostrand Co.) ; " An Advanced Course in 

 Quantitative Analysis," by Professor Henry 

 Fay (John Wiley & Sons), another manual 

 based upon a long series of investigations; 

 and a " Volumetric Analysis," by A. J. Berry 

 (Cambridge University Press, England), a 

 manual prepared for a college course in an- 

 alytical chemistry, in which the general dis- 

 cussion of the subject appears to excel the 

 directions for analysis. 



Teachers of stoichiometry are already famil- 

 iar with Dr. R. H. Ashley's "Chemical Cal- 

 culations" (D. Van Nostrand Co.), of which 

 a second edition has recently appeared. 

 Errors have been corrected, but no change has 

 been made in the subject matter. 



Along the lines of what is commonly known 

 as physical chemistry, the editor's collection 



