of certain Chemical Actions, etc. 



275 





■440 





































5n 



430 



































Si 





















'-J 













/ 









g 

 o 



4 20 











y^ 



























410 





















-— " 

















Time in hours 

 Fig. 2. 



530 



525 



& 52 ° 

 % & 



o 515 

 3 



o 51 ° 



505 

 500 

 495 



































































• j 































































































































, 20 30 40 



Time in minutes 

 Fig. 3. 



19—2 



