ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 371 



meeting with his lecture on " Mendelism and its connection with 

 Microscopy." Attention was drawn to the modification in current views 

 on variation, the origin of species, etc., which seemed to follow an 

 acceptance of Mendel's law. 



Microscopy of Vegetable Foods.* — In collaboration with Josef 

 Moeller, Andrew L. Winton has brought out what is probably the first 

 work in an English dress which deals exclusively with the microscopy of 

 vegetable foods. It has special reference to the detection of adulteration 

 and the diagnosis of mixtures, and has been designed for the use of the 

 food analyst, the agricultural chemist, the pharmacist, and others engaged 

 in the examination of foods, as well as the physician who may be called 

 upon to identify vegetable substances in stomach contents and fasces. 



The work is divided into 10 parts, which deal with : (1) Equipment 

 methods and general principles ; (2) grain, its products and impurities ; 

 (3) oilseeds and oilcakes ; (4) legumes ; (5) nuts ; (6) fruit and fruit 

 products ; (7) vegetables ; (8) alkaloidal products and their substitutes ; 

 (9) spices and condiments ; (10) commercial starches. At the end is a 

 useful glossary ; the bibliography is copious, and is both general and 

 special. The volume is excellently got up ; it is profusely illustrated. 



The work has evidently been prepared with great care, and the 

 names of the authors are sufficient guarantee for the contents. 



Michaelis, L. — UTtramikroskopische TJntersuchungen. 



[This is an abstract of the author's article in Virchow's Arch., clxxix. (1905) 

 heft 2, pp. 195-208, 1 pi.] 



Zeitschr. wiss. Mikr., xxii. (Dec. 1905) p. 423. 



Zsigmondy, R. — Zur Erkenntnis der Kolloide. Ueber irreversible Hydrosole und 



Ultramikroscopie. Jena : G. Fischer (1905) 8vo, vi. and 186 pp., 



6 figs, and 4 pis. 

 Zetzsche, F. — Das Mikroskop, seine Entwickelongsgeschichte. Mit Faksimile- 

 portrait Lieuwenhoeks and Zanlreichen Textabbildungen. 



Kotzschenbroda and Leipzig : Thalwitzer. 



B. Technique.* 

 (1) Collecting Objects, including- Culture Processes. 



Collecting Rotifera.f — P. de Beauchamp recommends the following 

 method and procedure for the wholesale preservation of Rotifera for 

 study of the fauna of a lake or district, or for making collections when 

 travelling in new or distant countries, when an examination on the spot 

 is impracticable. After collecting the small plankton in the usual 

 way, he places the condensed material in a bottle, and allows it to stand 

 for half an hour or an hour, at the same time subjecting it to a one- 

 sided illumination. As a result of this, all large floating debris will 

 settle at the bottom, while the Rotif era will mostly congregate in the 

 illuminated portion near the top of the water, where they can be seen 

 with the naked eye like a white cloud. From this region a tube full of 



* New York : John Wiley and Sons. London : Chapman and Hall, Ltd., 1906, 

 xvi. and 701 pp., 589 figs. 



t 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, &c. ; 

 (6) Miscellaneous. 



I Arch. Zool. Exper., Notes et Revue, iv. (1906) pp. xxvii.-xxxiii. 



2 B 2 



