Dr. Thomson on Oxalic Acid. 81 
warranted therefore to add it to the weight of the gaseous pro- 
ducts obtained. 
Now the gas was composed of 
Carbonic acid 10.5 cubic inches = 4.9 grains. 
Inflammable air 35.1 - - = 9.9 
so that one-third of the weight was carbonic acid, and two- 
thirds inflammable air. If we divide the 5.4 grains of loss, 
in that proportion we obtain 1.8 grains carbonic acid, and 3.6 
grains of inflammable air. Adding these quantities to the 
weight obtained, we get for the weight of the whole gaseous 
product 
Grains. 
Carbonic acid 6.7 
Inflammable air 13.5 
20.2 
The 62.4 grains of residue in the retort were composed of 
Grains. 
Lime - 
33-4 
Carbonic acid 
26.4 
Charcoal 
2 .6 
0 I 
to 
Now it is clear, that the 89 grains of oxalate of lime were 
composed of 
Lime - 33.4 
Acid - - 55.6 
89.0 
The acid was completely decomposed and resolved into the 
following products : 
MDCCCVIII. M 
