101 
100 parts of oxalic acid contain : 
Carbon 
26,566 
Hydrogene - 
2,745 
Oxygene 
70,689 
100 parts of tartaric acid contain 
: 
Carbon 
24,050 
Hydrogene 
6,629 
Oxygene 
69,321 
Ditto citric acid : 
Carbon 
33,811 
Hydrogene 
6,330 
Oxygene 
59,859 
Ditto of acetic acid : 
Carbon 
50,224 
Hydrogene - 
5,629 
Oxygene 
44,147 
Ditto mucous or saclactic acid : 
Carbon 
33,69 
Hydrogene 
3,62 
Oxygene 
62,69 
These estimations agree nearly with the follow- 
ing definite proportions. In oxalic acid, 7 propor- 
tions of carbon, 8 of hydrogene, and 15 oxygene ; 
in tartaric acid, 8 carbon, 28 hydrogene, 18 oxy- 
gene 5 in citric acid, 3 carbon, 6 hydrogene, 4> 
oxygene ; in acetic acid, 18 carbon, 22 hydrogene, 
12 oxygene ; in mucous acid, 6 carbon, 7 hydro- 
gene, 8 oxygene. 
The applications of the vegetable acids are well 
known. The acetic and citric acids are extensively 
used. The agreeable taste and wholesomeness of 
various vegetable substances used as food, mate- 
rially depend upon the vegetable acid they contain. 
H 3 
