By the use of the following apparatus, devised for the 

 rapid delivery of a given quantity of fluid, sterile 

 or not, accurate results are obtained, and both time 

 and labour saved, one person only being required to work 

 it. Absolute exactitude and rapidity of flow are not only of 

 importance when bottling anti-sera, but are equally im- 

 portant in measuring definite quantities of blood, cultures 

 etc. for hajmolytic and agglntinin experiments respec- 

 tively. 



The apparatus consists in the main of two parts, 

 the measuring apparatus itself, and the stand to which 

 this is affixed. 



The measuring apparatus as seen in front view (Fig. 

 A) consists of a central branched tube of brass, a four 

 way stopcock(e), and two graduated pipettes (c) con- 

 nected by means of india rubber tubes with the 

 side branches of the central tube. The pipettes used, 

 are ordinary glass pipettes, having a capacity of 5 20 

 Cc. The upper ends are bent at a sharp angle and have 

 only a small bore. Round this portion of each pipette 

 a glass bulb is melted on, with an overflow lube (1) 

 proceeding from it. The pipettes are attached by means 

 of a moveable screw clamp (d) to the central tube. 



The movement of the stopcock is brought about by 

 the action of the pedals. The bore of the stopcock is 

 so arranged that fluid cannot flow in either direction 



