GASES EVOLVED FROM GLASSES 



127 



Evolution of Adsorbed and Absorbed Gas 

 To determine the relations of adsorbed gases to absorbed gases in 

 the six samples of glass, the pressures of the gases evolved were deter- 

 mined at intervals of 100°C. from 100°C. to the softening point of 

 the glass. In addition to the six samples of glass, a run was taken on 



Z 

 Q 



h- 



D 

 _l 

 O 

 > 

 id 



< 



< 



O 

 h 



\P* 



100 200 300 400 500 



DEGREES CENTIGRADE 

 Fig. 2 



600 



