^^■■^^ 



320 Prof. Adeney and Mr. Becker: Determination of Bate of 



traces of air expelled from the rounded end of the 

 rubber by repeatedly drawing water in and out of the 

 capillary. 



Fig-. 1. 



Mercury-Pump and Storage Pipette. 

 The gas-pipette, which is shown in position in fig. 1, was 



