574 



Kenneth. A. Miclde 



rewetted. This seemed to show that the dry minerals adsorb 

 C0<5 and air. A sample of crushed dry crystalline galena was, 

 however, not affected by passing dry CO^ over it. 



Description of Apparatus. 



A — vacuum flask with mercury. 



B — 100 c.c. burette 30 inches in height. 



C — capillary tube. 



D — glass gas tight flask 30 c.c. capacity. 



E — tap and tube with groTind glass joint. 



F — capillary rubber joints wired on. 



H — do. do. do. 



G — cloth filter on end of joint E. 



K — burette tap. 



P — connection to water pump. 



