420 J. W. HOGAETH. 



until the level of liquid rises to the desired mark in a, rod 

 d is then released, when it is automatically forced back into 

 position by the rubber e which is stretched from the disc 

 on d to the out-turned edge of a short glass tube through 

 which d passes. This liquid is then delivered in the ordinary 

 way by blowing into f , as soon as the liquid in a falls to the 

 curved tube c liquid ceases to pass up b. 



The vessel which was of 15 cc. capacity, delivered any 

 desired volume within that limit to ± £ cc. Fig. 2 shows 

 the apparatus as it fits in an ordinary flask. As far as can 

 be ascertained this apparatus lias not elsewhere been 

 described. 



The author here takes the opportunity of tendering^his 

 thanks to Acting Professor Schofield for the interest shown 

 and encouragement that he has often given him. 



