76 GEOLOGY OF AGRICULTUEE. 



eacli stage; and hence the propriety of the names 



123. Besides these acids there are also many other 

 vegetable acids. Only two need be mentioned here. Ono 

 of these is oxalic acid, composed of carbon and oxj- 

 gen (CO^) ; the other is acetic acid (vinegar), com- 

 posed of carbon, oxygen, and hydrogen (OHO). These, 

 together with the five vegetable acids before named, 

 combine with the bases (Table III), and form com- 

 pounds named from the acid and the base, in the same 

 manner as the inorganic acids ; as acetate of potash, 

 oxalate of lime, &c., thus : 



