132 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
is intended to contain hot water, which is heated by means of a spirit- 
lamp. . In the vessel a is placed a layer of cotton-wool 10 cm. thick, 
and this is, before using, damped with hot water. 
The agar solution, made according to J akobi’s formula, is then 
poured into a, and the aperture closed with the caoutchouc plug, to 
which is attached the hand-bellows. The agar solution is thus ma r !o 
Fig. 12. p 1G< i3 
to run out through the pipe at the bottom by means of compressed air, 
and is allowed to flow into sterilized vessels. The hot- water jacket 
prevents the agar from cooling too quickly, so that many test-tubes 
may be filled very easily. Fig. 13 gives an outside view of the whole 
apparatus. 
Pure Cultivations of Gonococcus.* — Herren H. von Schrotter and 
F. Winkler recommend the albumen of plover's eggs as an excellent 
nutritive medium for easily obtaining pure cultivations of Neisser’s 
gonococcus. The medium is prepared after the method of Dal Pozzo.f 
* Mittheil. aus d. Wiener Embryol. Ift3titut, 1890, pp. 29-34. 
t See this Journal, 1888, p. 1037. 
