the Carinthian Molybdate of Lead. 311 
pot-ash, and a small quantity of white precipitate with mu- 
riate of barytes. 
The residuum was not affected when afterwards digested 
with acids or alkalies. 
Some of the white precipitate was boiled with lixivium of 
carbonate of pot-ash, and part was dissolved. The solution 
was then saturated with muriatic acid, and prussiate of pot- 
ash produced a blue precipitate. 
With carbonate of soda the effects were the same. 
A solution made with carbonate of ammoniac (afterwards 
saturated with muriatic acid) was tinged green by the addi- 
tion of prussiate of pot-ash. 
A mixture, composed of 20 grains of the precipitate, and 50 
grains of sulphur, was put into a small glass retort, and dis- 
tilled till all of the sulphur was driven over. 
The powder in the retort was of a pale grey colour, did not 
stain the fingers, or feel greasy, and had an hepatic smell. 
Diluted nitric acid was digested on it without heat, and 
when prussiate of pot-ash was added to a part of the clear so- 
lution, a brown cloud was produced in about 10 minutes, re- 
sembling the usual precipitate of molybdasna. 
Lixivium of carbonate of pot-ash added to another portion, 
formed a white flocculent precipitate, like starch. 
Concentrated nitric acid was afterwards digested on the 
grey powder in a strong heat, and dissolved a considerable part 
With this solution, prussiate of pot-ash produced a brown 
precipitate, intermixed with some blue particles. 
The rest of the solution was then evaporated, and left a 
bright yellow mass at the bottom of the matrass. 
mdccxcvi. S s 
