TEST APPARATUS FOR TISSOT METHOD. 81 



closed. The burette was then filled again, and the flow of alcohol 

 was regulated by manipulation of the pinchcock 0. The stoppers L 

 and K were next taken out and the alcohol flowing from B was 

 lighted by means of a wax taper. When the flame was burning 

 regularly, the stoppers L and K were put in place and the bell, M , of 

 the hand spirometer immediately raised by means of the handle N. 

 Regular up-and-down movements of the bell were then made, causing 

 the air to enter the apparatus at H with each upward movement and 

 to leave at / with each downward movement. After a few minutes, 

 a reading was taken of the burette A and the three-way valve (see A, 

 figs. 26 and 27) on the Tissot spirometer was turned so that the air 

 leaving / entered the spirometer. After a suitable length of time 

 had elapsed another reading of the burette was made and the three- 

 way valve on the Tissot spirometer was turned to its original position. 

 A sample of air was then taken from the spirometer and analyzed as for 

 a respiration experiment. From the volume and composition of the 

 air in the spirometer a calculation was made of the carbon dioxide 

 produced and the oxygen consumed by the burning alcohol and the 

 results were compared with the theoretical amounts computed from the 

 amounts of alcohol burned. 



