FEBRuiKY 1, 1896.] 



KNOWLEDGE 



33 



investigators will find the volume contains the best modern 

 treatment of their subject. 



Handbook of Industrial Organic Chemistry. By Dr. 

 S. P. Sadtler. 2ad Edition. (Lippincott.) _ The first 

 edition of this handbook was well received in this country, 

 and supplied a gap in the existing literature. During the 

 forr years which have elapsed since the first edition was 

 published, England has produced several books dealing 

 with industrial organic chemistry, so that the want is 

 hardly so acutely felt now as formerly. The literature 

 has, however, been more of special character than of the 

 general description covered by Dr. Sadtler's book ; and as 

 he has taken con- 

 siderable pains in 

 incorporating the re- 

 cent progress made 

 in the several de- 

 partments, we think 

 that the new edition 

 will be welcome to 

 many chemists. Dr. 

 Sadtler's book is espe- 

 cially valuable for 

 the statistics which 

 it contains of the 

 world's production of 

 raw materials and 

 their finished pro- 

 ducts ; and as he has 

 also completed each 

 section of this work 

 by a bibliography of 

 the special works of 

 reference, the reader 

 has afi'orded to him 

 information which 

 will enable him to 

 further study any 

 special point. The 

 methods of analysis 

 given by the author 

 are, however, fre- 

 quently wanting in 

 details. His method 

 of procedure seems to 

 have been to abridge 

 and abstract the in- 

 formation contained 

 in "Allen's Com- 

 mercial Organic 

 Analysis." The 

 section devoted to 

 vegetable textile 

 fibres is well written, 

 and gives a good 

 rrsiimc of the im- 

 portant industries 

 connected therewith ; 

 and under " Animal 

 Tissues and their Products" is a good general account of 

 the leather inaustry and the allied manufactures of glue 

 and gelatine. 



OiUlincH of Psiiclioloii;/. By Prof. Oswald Kiilpe. Trans- 

 lated from the German by Prof. E. B. Titchener. (Swan 

 Sonnenschein.) lOs. Cd. The science of psychology 

 can be divided into two main branches ; the first is the 

 descriptive and metaphysical branch, which dominated it 

 for ages, while the newer movement is experimental and 

 psycho-physical. Prof. Iviilpc's work is concerned with 



Youug Grey Lag GctBC. from British £irds' Xests, 



investigations in the latter direction. In this country 

 psychology is not given so much attention as in Germany 

 and America, but the number of its students is gradually 

 increasing. Doubtless this translation of a work by one 

 of the foremost investigators of the modern school will 

 give an efi'ective impulse to the study of the science with 

 which it deals. Kant shared with others the view that 

 there could not be an exact science of psychology ; but 

 their opinions are refuted by the fact that physiological 

 psychology, or psycho-physics, has established important 

 propositions capable of exact mathematical treatment, 

 whereas Kant argued that mathematics could not be 



applied to conscious 

 processes. There is 

 certainly an in- 

 creasing demand for 

 psychological litera- 

 ture at the present 

 time ; and though 

 the supply is now 

 kept up mostly by 

 translations from the 

 German, it is to be 

 hoped that the future 

 will see larger 

 contributions from 

 British workers. 



A Labor atari/ 

 Manual of Orfiaiiic 

 Vheiitifitri/. By Dr. 

 Lassar-Cohu. Trans- 

 lated by Dr. A. Smith. 

 (Macmillan.) 8s. 6d. 

 We are very pleased 

 with this guide to 

 practical organic 

 chemistry ; it cer- 

 tainly fills a gap in 

 our English chemical 

 literature. Nearly 

 five years have elapsed 

 since the publication 

 of the first German 

 edition, and during 

 that time this most 

 useful work has met 

 with a warm recep- 

 tion among German 

 chemists, and has 

 been introduced as a 

 standard manual into 

 most of the univer- 

 sity laboratories and 

 polytechnics in Ger- 

 many. This success 

 is undoubtedly due to 

 the very systematic 

 method adopted by 

 the author of arrang- 

 ing the several methods of chemical operations into distinct 

 chapters, and giving such practical working details that 

 even the novice need not go far astray when performing a 

 new task. We hope that the book in its English edition 

 will meet with a similar reception both in this country and 

 America, as the translator has performed his duties in an 

 exemplary manner, and has further enhanced the value 

 of the book by his rearrangement of the index. 



Ihitish Birdf:' X'Xts. By R. Keartou. With an Introduction 

 byK. BowdlerSharpc, LL.D. (Casscll.i Illustrated, 'ils. 



