jgg ON OXALIC ACID. 



late of lime ctilarly. Eighty-nine grains of well dried oxalate of lime 

 J^eated in a re- ^^^.^ gj^p^ggf] ^u .^ si^fiall reto"t to a heat gradually raised to 

 redness; the products were the following: 



Grains, 

 45"6 cubic inches of gas* weighing. • . • 14-8 



Water 6'4 



Residue in retort 62*4 



83-6 

 Loss 5.4 



Total 89-0 



The loss is obviously owing to the gas, which filled the re- 

 tort and tube when the experiment was concluded. We 

 are warranted therefore to add it to the weight of the gase- 

 ous products obtained. 



Now the gas was composed of 



Carbonic acid • • 10'5 cubic inches = 4*9 grains. 

 Inflammable air 35' 1 — Q-Q 



so that one third of the weight was caibonic acid, and two 

 thirds inflammable air. If we divide the 5*4 grains of loss 

 in that proportion, we obtain 1'8 grain 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. 

 Gaseous pro- Carbonic acid .... 6'7 



Inflammable air •• 13*5 



20-2 



'"f he 62*4 grains of residue in the retort were composed of 



Grains. 



Residuum. Lime 33 '4 



Carbonic acid • • • • 26*4 

 Charcoal 2*6 



62-4 



•The gas obtained measured 60 cubic inches, but 14'4 inches of these 

 were found to be common air, which had preyiously filled the retort and 

 tubej this quantity >vas therefore deducted. 



Now 



