the Carinthian Molybdate of Lead . 327 
Lastly, the white flocculent matter was boiled with nitric 
acid, and became like the molybdic acid before it was dis- 
solved. / 
E. Nitric acid did not appear to have any effect on the 
molybdic acid when digested with it. 
F. Two ounces of lixivium of carbonate of pot-ash were 
poured on ten grains of the molybdic acid. 
In a few minutes, carbonic acid was gradually expelled, and 
as the molybdic acid dissolved, a white flocculent matter was 
deposited. 
After it had stood some hours, the clear liquor was decanted 
from the residuum. 
Prussiate of pot-ash did not affect this solution. Some 
nitric acid was then dropped in, and produced a reddish- 
brown precipitate, which was redissolved until the acid was in 
some excess. 
Muriate of tin, when added to a portion of the alkaline so- 
lution, was precipitated white, but when some muriatic acid 
was dropped in the precipitate became blue. 
The white flocculent residuum, when treated with nitric 
acid as in the former experiments, was converted into the 
yellow molybdic acid. 
Another portion of the alkaline solution was evaporated to 
one-fourth, and in proportion as the evaporation advanced, 
some of the white flocculent matter was precipitated, but I 
did not obtain any crystals. 
G. Two ounces of lixivium of carbonate of soda were 
poured on ten grains of molybdic acid. 
In a few minutes carbonic acid was expelled, and when the 
MDCCXCVI. U U 
