ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
245 
dealing with the technique required for the microscopical examination 
of micro-organisms. 
In the general portion of the work the author treats of the morpho- 
logy, biology, and classification of bacteria, and then describes the 
means for their prevention, their observation, and their cultivation. 
In the special part are discussed the most important of the patho- 
genic bacteria, and also a certain number of saprophytic organisms. 
Bacteriology for Farmers.* — The object of this work, written by 
Dr. W. Migula, is to disseminate the results of bacteriological investi- 
gations in so far as they may have practical bearings, and consequently 
it does not present any novel features. It is apparently chiefly intended 
for persons engaged in agricultural pursuits, and to these at any rate it 
may be recommended. 
David, Th. — Les'microbes de la bouche. (The Microbes of the Mouth.) 
Paris, 1890, 8vo, 113 figs. 
Despeignes, V. — Etude experimental sur les microbes des eaux. (Experimental 
Study on the Microbes of Water.) Paris, 1891, 8 vo. 
Keck, E.— Ueber das Verhalten der Bakterien im Grundwasser Dorpats, nebst 
Beschreibung von 10 am haufigsten in demselben vorkommenden Bakterienarten. 
(On the Bacteria in the ground-water of Dorpat, with description of ten of the 
commonest species found therein.) Dorpat, 1890, large 8vo, 66 pp. 
Lewandowski, A. — Ueber Indol und Phenolbildung durcb Bakterien. (On the 
Formation of Indol and Phenol by Bacteria.) 
Deutsche Med. Wochenschr., 1890, No. 51, p. 1186. 
Nutt all, G. H. F. — Beitrage zur Kenntniss der Immunitat. (Contributions to 
. our knowledge of Immunity.) Gottingen, 1891, large 8vo, 55 pp. 
Potter, T. — Some of the Problems of Bacteriology. 
Indiana Med. Journ., 1890-1, pp. 28-30. 
Prudden, T. M. — Bacillus versicolor. 
Proc. New York Pathol. Soc. (1889) 1890, p. 103. 
Rubner. — Beitrage zur Lehre von den Wasserbakterien. (On Water-Bacteria.) 
Arch. f. Hygiene , XI. (1890) Heft 4, pp. 365-95. 
Smith, T. — Observations on the Variability of Disease Germs. 
New York Med. Journ., II. (1890) No. 18, pp. 485-7. 
Tils, J. — Bakteriologische Untersuchung der Freiburger Leitungswasser. (Bacterio- 
logical Examination of the Water of Freiburg.) 
Zeitschr. f. Hygiene , IX. (1890) Heft 2, pp. 282-322. 
Turin a, V. A. — Ricerche sui germi dall’aria e della polvere degli ambienti 
abitati. (Researches on the Germs of the Air and Dust of Inhabited Regions.) 
Giorn. d. Reale Soc. Ital. d’lgiene, 1890, Nos. 8-10, pp. 452-66. 
* Berlin, 1890, 8vo. 144 pp. See Centralbl. f. Bakteriol. u. Parasitenk., viii. 
(1890) p. 361. 
