298 Mr. Hatchett's Analysis of 
C. Nitric acid diluted with six parts of water was then 
poured on the undissolved powder, and was digested on it in 
a sand heat. 
The powder was nearly dissolved, and the solution was 
colourless. 
1. From this solution I precipitated sulphate of lead by the 
means of sulphuric acid. 
2. With prussiate of pot-ash I obtained a brown precipitate 
of molybdasna, and 
3. Muriate of tin turned another portion of it blue. 
From these experiments it appears that the first solution 
contained iron, with some molybdic acid dissolved in muriatic 
acid ; and the second solution contained molybdic acid and 
lead. 
Molybdate of Lead sublimed with Muriate of Ammoniac. 
EXPERIMENT II. 
125 Grains of the ore were mixed with two ounces of mu- 
riate of ammoniac, and put into an earthen matrass, to which 
a head of stone-ware was fitted. The matrass was then ex- 
posed to a sufficient degree of heat, and when all was sublimed 
the vessels were separated. 
The black powder which remained was mixed with two 
ounces of muriate of ammoniac, and again sublimed. 
This operation was repeated three times, after which nothing 
remained in the matrass. The sublimate, as before, was yel- 
low, green, and blue. 
A. Distilled water was poured on the sublimate, so as to 
