666 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
and has adopted Hest’s method, which consists in using a bunch of 
tubing with sixteen bends. The tubes are made of brass or copper, are 
drawn out, and are without join or soldering. The measurements given 
are, — wall about 0*75 mm., bore 1-3 mm. The length of a single bend 
is about 1 * 5 cm. The construction of the bunch is easily gathered from 
Fig. 165. 
the illustrations (figs. 165-167). It will be seen that one end is long, 
the other short, and that both point downwards. The long end is 
inserted in the rubber plug which fits into the neck of the flask 
(fig. 165). At 1 cm. above the bottom of the flask, projects a tube 
Fig. 166. 
Fig. 167. 
3 cm. long, with a lumen of 3-4 mm. The end of this tube is slightly 
expanded, and to it is connected a rubber tube closed by a pinch-cock. 
Through this tube fluid is withdrawn as desired. 
Burette for Bacteriological and other Titrations.* — Dr. L. Heyden- 
reich describes a burette which possesses the advantage of measuring 
* Zeitsclir. f. wiss. Mikr., xvi. (1899) pp. 145-9 (2 figs.). 
