TEZ ;i 



arises, 

 of water, carbonic acid, 





m 



F : t 11 r : r 15 11: 



ri: -__.;_ lii rrl It 1 



11 f . . - 



1111 r 





H. Iifr a iMcfcww Inm 



point of vie-a- of p 



A - 1_r 







