ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 113 



MICROSCOPY. 



A. Instruments, Accessories, etc.* 



C4) Photomicrography. 



Bagshaw's Elementary Photomicrography .-f — This useful little 

 manual, of which the third edition has just appeared, should be in the 

 hands of every beginner in photomicrograpliy. It is intended to make 

 plain and smooth the part of the inexpert, and, if simplicity of explana- 

 tion and avoidance of technical terms can accomplish that object, no one 

 who follows its instructions ought to fail. At the same time it is a 

 serious book because it does not shirk difficulties, and because it is 

 enriched with a large number of beautiful half-tone photomicrographs 

 which are calculated to encourage the student to persevere. The author 

 limits himself to the simplest apparatus, and the original prints of the 

 illustrations were all taken with objectives supplied with an ordinary 

 student's Microscope. A bibliography of books useful to those who 

 wish to extend their researches in photomicrography adds to the value 

 of the manual. 



B. Technique. J 

 (1) Collecting- Objects, including Culture Processes. 



Haemoculture in Citrated Broth. § — The advantages claimed for 

 the Conradi-Kayser method of blood cultures in ox-bile are : (a) that 

 the medium dissolves the blood corpuscles ; {h) prevents coagulation 

 of the blood ; and (c) constitutes a very good medium for the growth 

 of typhoid and paratyphoid bacilli. A. Leboeuf, J. Bonafous and 

 P. Braun have substituted for this medium one consisting of citrated 

 broth, which, in addition to being more readily obtainable, is said to 

 give equally good results. The new medium inhibits the coagulation 

 of the blood, and thus eliminates the most adverse factor against the 

 growth of the organisms. 0'5 com. of 10 p.c. citrate of soda solution 

 are added to each 10 c.cm. of pepton broth, the medium being sterilized 

 after the addition of the soda solution. 2 c.cm. of blood from the 



* This subdivision contains (1) Stands ; (2) Eye-pieces and Objectives ; (3) 

 Illuminating and other Apparatus ; (4) Photomicrography ; (5) Microscopical 

 Optics and Manipulation ; (6) Miscellaneous. 



t Iliffe and Sons, London, 1915, 140 pp. (15 pis. and 20 figs.). 



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

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

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

 (6) Miscellaneous. 



§ G.R. Soc. Biol., Paris, Ixxviii. (1915), pp. 662-5. 



Feb. IGth, 1916 i 



