ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 101 



seem to point to allotropy, which is found to be modified by the impurities 

 in section iii. 



Notes on the Microscope in the Drug- Store.* — Dr. H. M. Whelpley 

 describes the value of even a low power cheap Microscope to a pharma- 

 cist. Among articles which are readily discriminated by such an 

 instrument are : the different grades of hydrargyrum cum creta, leaves 

 of senna and long buchu, short buchu and uva ursi ; adulterations of 

 lupulin ; powdered rhubarb ; distinction between fruits of hemlock and 

 anise, &c. 



Rice, F. S. — Microstructural Characteristics of Steel. 



Trans. Amer. Micr. Soc, Aug. 1897. 



Molderke, R. — The Microscope in the Study of Iron. 



Iron Trade Review, Oct. 28, 1897, p. 19. 



Renard, A. F., & F. Stober— Notions de Mineralogie. 



[A j noticeable feature of the short section on chemical crystallography is the 

 inclusion of a number of micro-chemical tests, with figures of the crystalline 

 products.] Ad. Hoste, Gand, 1900, x. and 374 pp., 732 figs. 



The Metallographist. A quarterly publication devoted to the study of Metals, with 



special reference to their Physics and Microstructure, their Industrial Treatment 



and Applications. Boston, U.S.A. 



In addition to the articles abstracted in our Journal, the following possess 



microscopical interest : — 



Jan. 1898. Microstructure of Steel and the Current Theories of Hardening, 

 pp. 27-51, numerous tables and figs. Albert Sauveur. 



Jan. 1898. Microscope Accessories for Metallograpbers, pp. 82-3 (2 figs.). 

 J. E. Stead. 



[The author applies a method of fracturing to determine the locality of im- 

 purities in a metal.] 

 April 1898. Bibliography of the Metallography of Iron and Steel, pp. 168-78. 

 [Arranged alphabetically under authors' names; too long to quote; apparently 

 a very complete list; nearly all the citations seem to bear on microscopy; 

 some sixty authorities (English, French, German, American), covering the 

 last twenty years, are given.] 



* Amer. Mon. Micr. Journ., 1900, pp. 305-8; quoted from Bull, of Pharmacy. 



