ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 375 



decolorise with 95 p.c. alcohol ; wash in the alcohol-ether mixture, wash 

 with water, stain for a few minutes with eosin, wash off excess with 

 Loeffler's solution. Drop on more methylen-blue solution and heat ; 

 decolorise with 95 p.c. alcohol, wash in absolute alcohol, treat with 

 xylol, and mount in balsam. 



(5) Mounting:, including: Slides, Preservative Fluids, &c. 



Strasser. H. — Die Nachbehandlung der Serienschnitte auf Papier-unterlagen. 

 (The after-treatment of serial sections on paper-underlays.) 



Zdtschr. iciss. Mikr., XIX. (1903) pp. 337-45. 



(6) Miscellaneous. 



Encyclopaedia of Microscopical Technique.* — The recent issue of 

 the Encyclopaedia of Microscopical Technique is an event of great im- 

 portance in the world of microscopical literature. The work appears 

 in two volumes comprising together some l-AOO octavo pages, and whilst 

 appealing primarily to the medical microscopist contains much that is 

 interesting and valuable as well as instructive to the technical student 

 and also to the amateur. The Encyclopaedia is devoted solely and 

 entirely to descriptions of apparatus and methods, and the articles, 

 numbering several thousands, vary considerably in length — many ex- 

 tending to thirty, fifty, or even more pages — and form masterly treatises 

 in their respective subjects. Many articles are signed, and wherever the 

 importance of the subject demands such additions, a fairly complete 

 bibliography is appended. The printing and paper are good ; the subject 

 headings being printed in larger and blacker type render it an easy 

 matter to find any desired article. 



Illustrations are scattered through the pages to the number of about 

 130 in the two volumes. These form perhaps the only disappointing 

 feature of the Encyclopaedia, consisting for the most part of woodcuts 

 of apparatus and diagrams culled from the catalogues of various micro- 

 scopical instrument makers. "Within the pages of this Encyclopaedia are 

 to be found minute details of all the various methods of microscopical 

 research, in all its various branches, histology, pathology, zoology, 

 botany, bacteriology, &c, some of the most important being those on 

 fixation by von Tellyesniczky, injection by Prof. Hoyer, paraffin and 

 paraffin imbedding by Xeumayer, serial sections (celloidin) by Helbing,. 

 photomicrography by Zoth. The various stains and chemical reagents 

 employed in microscopical work, such as corrosive sublimate, osmic acid, 

 iodine, chromic acid and its salts, are also carefully described and their 

 special applications fully discussed. 



Embryology is well catered for, two papers in particular, Embryo- 

 logical Technique and Methods of Experimental Embryology, by Prof. 

 Ballowitz and Dr. Wetzel respectively, being worthy of careful perusal. 



Special methods of staining too are very fully and carefully treated, 



* ' Encyklop'adie der Mikroskopischen Technik mit besonderer Beriicksichtigung- 

 der F'arbelehre, lierausgegeben von P. Ehrlich, M. Mosse, R. Krause, H. Rosin und t 

 C. Weigert,' Berlin and Vienna, 1903, 2 vols., 1400 pp., with illustrations. 



