Solution of Atmospheric Nitrogen and Oxygen by Water. 321 



provided with a conical tube, which allowed of a gas-tight 

 joint being made when pressed up against the rubber-tipped 

 capillary. The gases could then be extracted from the 



F«r. 2. 



Eudiometer and Reagent Pipette. 



water in the laboratory flask and stored in the gas-pipette 

 by boiling the water and drawing the gases over into the 

 pump, and thence expelling them into the pipette, by 

 operating the mercury reservoir of the pump. Any excess 

 of water which distilled over was returned to the laboratory 

 flask. When the gases were completely extracted and stored 

 in the gas-pipette, the latter was removed and attached to 

 the eudiometer, shown in £g. 2, by a similar joint, and the 



