236 On the Effect of the Quantity of Matter in 
a regular and uniform flow of the gas—and that the process 
is stopped when the gas-bottle is heated to whiteness, and 
the gas still continues to come over, though but slowly.* 
The carbonate of lime affords corresponding results. A low 
red heat drives off the carbonic acid but for its entire sepa- 
ration, a violent heat is required, even when the carbonate 
has been procured from the muriate, by means of a carbo- 
nated alkali, and is therefore in the state of an impalpable 
proportions are fe d, so as to exert an influence u 
atoms between which there is no proper chemical combina- 
tion, and ena arge nu 0 compensate by the 
* Lorsque Poxide sera prés de la chaleur rouge il commencera se degaget 
du gaz oxigéne. Vous urrez regarder lopération comme faite lorsque le 
fourneau étant plein de feu il ne se dégagera presque plus de gaz.— Thenard. 
