Dr. Thomson on Oxalic Acid. 
83 
Grains. 
Oxygen - 11 .96 
Carbon - 10.43 
Hydrogen - 1.89 
24.28 
11,51 grains of water are composed of 
Oxygen 9.87 
Hydrogen 1.64 
n-5 1 
As for the charcoal, though it probably contains both oxy- 
gen and hydrogen as well as carbon, yet as the proportion of 
the two first ingredients is probably very small, and as we 
have no means of estimating them, we must at present rest 
satisfied with considering it as composed of pure carbon. 
When these different elements are collected under their 
proper heads, we obtain 
1. Oxygen in carbonic acid - 42.86 
— — inflammable air - 11.96 
— — water - - 9.87 
64.69 
2. Carbon in carbonic acid - 16.67 
— — inflammable air - 10.43 
— — - charcoal - - 4.68 
31.78 
3. Hydrogen in inflammable air - 1.89 
— — — water - - 1.64 
M 2 
353 
