ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



373 



the levelling flask is opened ; thereupon the culture is drawn up into 

 the pipette, which, when tilled is sealed in the flame and placed in the 

 incubator at 37° C. 



Vessel for receiving Blood.* — J. Bronstein describes the following 

 apparatus (fig. 49). It consists of a cylinder provided with two small 

 tubes (a and b) carrying short rubber tubing, and closed with wool 

 plugs ; the upper opening of the cylinder has a wool plug and a rubber 

 cap. In this state the whole is sterilised in an autoclave. Into the 

 jugular vein of a horse is introduced the hollow needle, provided with 

 a rubber tube and a glass end-piece, and this is attached to the lowest 

 tube (a) of the cylinder, the wool plug being removed, and the blood is 

 allowed to flow in up to the mark 1 l ; the rubber tube is then closed 

 by a clamp, and the cylinder is disconnected ; the separated serum is 

 removed by the upper tube {b). 





k 



Fig. 49. 



Fig. 50. 



Apparatus for Intravenous Injection. f — J. Bronstein describes the 

 annexed arrangement (fig. 50) for intravenous injection. The culture 

 fluid or emulsion to be injected is passed through a filter (a) provided 

 with a stop-cock ; the tube (&), plugged with wool, conveys a current of 

 air ; the lower part of the vessel ends in a bulb, to the open end of 

 which is attached a rubber tube carrying a hollow needle ; the outer 

 cylinder (d) contains warm water, whereby the culture fluid during the 

 process of injection is kept at the body temperature. 



* Centralbl. Bakt., Orig. l*e Abt., xl. (1906) p. 583. 



t Loc cit. 



