-ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
369 
and the filtration. Inside the large funnel is a small perforated funnel 
H^wliich serves to protect the paper filter. The filter may be made of 
Fig. 58. Fig. 59. 
thick filter paper or of flannel. The tube J is for the 
introduction of the fluid to be filtered. The apparatus is 
supported by the ring K. In order to heat the funnel only 
a small flame is necessary. 
Injection Syringe for Bacteriological Work.* — Dr. A. 
Cantani describes a syringe he has been using for some 
time past, with excellent effects. The syringe, which is 
easily constructed, consists of a nozzle, a glass tube, and a 
rubber ball, similar to that in Koch’s syringe. 
As may be seen from fig. 59, the front end of the 
syringe is narrowed a little, and to this is fastened the 
nozzle. About two centimetres from the other end is a 
capillary constriction, beyond which the tube is packed with 
cotton-wool. The ball is joined to the syringe by a piece 
of rubber tubing b. The instrument is very easily made, easily manipu- 
lated, and easily sterilised. 
Uew Autoclave.f — Dr. F. Abba describes an autoclave which he 
has used for some time with very satisfactory results. It works up to 
a pressure of 1/2 atmosphere, giving a temperature of 112°. Though 
* Centralbl. Bakt. u. Par., 1* Abt., xxiii. (1898) pp. 217-8 (1 fig.), 
f Tom. cit., pp. 462-5 (2 figs.). 
2 c 2 
