ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
391 
tion of the germicidal products of tissue change. The increased meta- 
bolism is the result of heightened activity of the cells in the protoplasm 
of which the bacteria are most easily destroyed. In local diseases the 
leucocytes co-operate in the destruction of the bacteria by surrounding 
them, and thus preventing their entrance into the lymph-streams. 
Antiseptic Action of the Fluoride of Methylen on the Pyogenic 
Bacteria of Urine.* — M. 0. Chabrie made the following experiments to 
ascertain if the gas discovered by him, fluoride of methylen, possessed 
an inhibitive action on the development of the pyogenic bacteria found 
in the urine. Two test-tubes containing urine infected with pyogenic 
bacteria were inverted under mercury ; one of the tubes contained equal 
volumes of air and the fluoride of methylen, the other air alone. After 
having been kept for 24 hours at a temperature of 35°, a drop was taken 
from each specimen and inoculated in sterilized bouillon. The two 
bouillon flasks were then incubated for 24 and 48 hours respectively. 
At the end of that time it was found that there was no development in 
the flask infected from the urine treated with the antiseptic gas, but in 
the other a copious development. 
A similar experiment was carried out, but this time the mercury was 
omitted; the same result was obtained. Hence the author concluded 
that this gas might be used for treating certain cases of inflammation of 
the bladder, provided that its action were not too irritating. To ascertain 
this, a mesentery and the web of a frog’s foot were exposed to the action 
of the vapour. No irritating effect was observed other than that pro- 
duced by the mere passage of air. 
Arloing — L’extinction des epidemics. (The Extinction of Epidemics.) 
Rev. Scientif ., XLYI. (1890) No. 23, pp. 713-23. 
Crookshank, E. M. — Manual of Bacteriology. 
3rd ed., London (Lewis), 1891, 8vo, 478 pp. 
Danilewsky, Y. — Sur les microbes de l’infection malarique aigue et chronique 
chez les oiseaux et chez l’homme. (On the Microbes of Acute and Chronic 
Malarial Infection in Birds and Man.) 
Annal. de l’ fastit. Pasteur , 1890, No. 12, pp. 753-9. 
Dittrich, P. — Die Bedeutung der Mikroorganismen der Mundhohle fur den 
menschlichen Organismus. (The Significance of the Micro-organisms of the 
Buccal Cavity to the Human Organism.) 
Prager Medic. Wochenschr., 1890, No. 38, pp. 475-77. 
Eisenburg, J. — Bakteriologische Diagnostik. Hilfstabellen zum Gebrauche beim 
prakt. Arbeiten. Nebst einem Anhang: Bakteriologische Technik. (Bacterio- 
logical Diagnosis ; Tables for the use of Practical Workers. With an Appendix 
on Bacteriological Technique. 
3rd ed., Hamburg (Leopold Yoss), 1891, large 8vo, xxxi. and 509 pp. 
Fraenkel, C., & Pfeiffer, R. — Mikrophotographischer Atlas der Bakterien- 
kunde. (Microphotographic Atlas of Bacteriology.) 
Berlin, 1891, large 8vo, 10 photog. 
G r a d e n i g s, G., & Penzo, R. — Bakteriologische Beobachtungen fiber den Inhalt 
der Trommelhohle in Kadavern von Neugeborenen und Sauglingen. (Bacterio- 
logical Observations on the contents of the Tympanic Cavity in the Corpses of 
newly-born and very young children.) 
Zeitschr. f. Ohrenheilk ., XXI. (1891) Hefte 3/4, pp. 298-305. 
Hurd, E. P. — Diseases whose causal Microbes are known. 
Med. Age , 1891, No. 1, pp. 1-7. 
Comptes Rendus, cxi. (1890) pp. 748-50. 
