46 



GAS ANALYSIS. 



[CH. II 



of a bell-shaped glass vessel 10 mm. in diameter, 20 mm. 

 in height holding about 1 c.c. and attached to a glass rod 

 H serving as a handle. 



R 





H 



P 



Fig. 10. Exp. 52. 



The carrier is filled with water and fixed so that the 

 bubbles coming off from a water plant collect in it. It is 



