ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



(6) Miscellaneous. 



Batsch's "Testacea Arenulae," 1791.*— E. Heron-Allen informs 

 us that by the courtesy of F. W. Millet, F.R.M.S., he has been informed 

 of yet another copy of this ultra-rare work, which is in that gentleman's 

 possession. As this newly recorded copy is said to contain both the 

 Latin and German versions of the text, it would also appear to be unique, 

 for no such edition has ever been recorded before. 



Apparatus and Practical Methods for the Microscopical Examina- 

 tion of Crystalline Bodies.f — This work is divided into five parts and 

 is published as a supplement to Mikrokosmos. Its object is to deal ex- 

 haustively with the subject of micro-crystallography in such a manner as 

 to meet the needs of amateurs and of all classes of investigators. The 

 first three parts are due to C. Leiss, and deal with penological Micro- 

 scopes and the various instruments and methods in general use for 

 preparing objects. The last part contains two sub-parts and is by 

 H. Schneiderhohn : it sets forth the methods of investigation in 

 systematic order. The titles of the parts are : — 



1. Structure and manipulation of the mineralogical Microscope and 

 its auxiliary apparatus (32 pp.). 



'1. Management of rock-preparations and their sections (5 pp.) 



3. Apparatus for determination of optical constants of crystalline 

 bodies (4 pp). 



4. Determination of physical constants of crystalline bodies by means 

 of the polarizing Microscope : — (a) transparent objects (4G pp.) ; 

 (b) opaque objects (5 pp.). The work also contains a bibliography of 

 modern authorities. 



B. Technique 4 

 (1) Collecting Objects, including Culture Processes. 



Pipette Method in the Isolation of Single Micro-organisms.§ 

 In this communication, M. A. Barber has collected together the various 

 descriptions which have appeared from time to time regarding the 

 technique and methods of application of the pipette method of isolating 

 single micro-organisms under microscopical control. He has also 



* See this Journal, 1914, p. 526. 



t Apparate und Arbeitsmethoden zur mikroskopischen Untersuchung Kristal- 

 lisierter-Korper. C. Leiss and H. Schneiderhohn. Stuttgart: "Mikrokosmos" 

 (1914) 94 pp. (115 figs.). 



X This subdivision contains (1) Collecting Objects, including Culture Pro- 

 cesses ; (2) Preparing Objects ; (3) Cutting, including Embedding and Microtomes ; 

 (4) Staining and Injecting ; (5) Mounting, including slides, preservative fluids, etc. ; 

 (6) Miscellaneous. 



§ Philippine Journ. Sci., ix. (1914) pp. 307-60 (19 figs, and 2 pis). 



