Geology and Natural History. 101 



(John Wiley & Sons). — In preparing the fourth English edition of 

 this well-known and valuable book, the translator has made 

 important additions to the last German edition by making use of 

 Classen's " Ausgewahlte Methoden der Analytischen Chemie " 

 and other recent publications. The book, containing, as it does, 

 the most recent methods, improved illustrations, and full refer- 

 ences to the literature of the subject, is to be highly recommended 

 to those who are interested in this branch of analytical chemistry. 



H. L. w. 

 7. Chemisches Praktikum ; von Dr. A. Wolfeum. II Theil, 

 Praparative und Fabrikatorische Uebungen, 12mo, pp. 580; mit 

 einem Atlas (4to, pp. 156 and 11 plates). Leipsic 1903 (Wilhelm 

 Engelmann). — The first volume of this excellent work was noticed 

 in vol. xiv of this Journal. The present part deals with a large 

 variety of chemical preparations, and the plan of giving the 

 student a knowledge of factory operations is well carried out. 

 The atlas contains a large number of interesting cuts, chiefly of 

 apparatus used in chemical manufacturing. h. l. w. 



II. Geology and ^N'atural History. 



1. United States Geological Survey. — The following publica- 

 tions have recently been received : 



Bulletin No. 213. — Contributions to Economic Geology, 

 1902, S. F. Emmons, C. W. Hayes, Geologist in Charge. 

 This bulletin was prepared in order to secure a prompt publi- 

 cation of the economic results of recent investigations by the 

 United States Geological Survey. The volume is divided into 

 two main divisions, one under the editorship of Mr. Emmons 

 treating of metalliferous mineral deposits and the other under the 

 editorship of Mr. Hayes of the occurrence of nonmetalliferous 

 economic minerals. It includes some 61 different contributions 

 from 33 members of the Survey. The papers represent three 

 classes: (1) Preliminary discussions of the results of extended 

 economic investigations which will later be published in more 

 detailed form ; (2) Comparatively detailed descriptions of occur- 

 rences of economic interest but not of sufficient importance to 

 necessitate a later and more extended description ; (3) Abstracts 

 of certain economic papers of a general nature which have 

 appeared in Survey publications during the year. w. e. f. 



Oelrichs Folio, South Dakota, Nebraska ; by X. H. Darton. — 

 The Oelrichs quadrangle covers an area on the eastern edge of the 

 Black Hills and contains features of the Black Hills proper, of 

 the hogback rim and of the great plains. The sedimentary 

 record deals with strata from late Carboniferous to recent. The 

 simplicity of geologic structure exhibited in this region makes 

 the folio of great educational value. 



Water Supply and Irrigation Papers : No. 73. — Water 

 Storage on Salt River, Arizona ; by A. P. Davis. 52 pp., 25 pis., 

 4 figs. 



