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Mr. Hatchett's Analysis of 
§ II. Characters of the Carinthian Molybdate of Lead. 
The molybdate of lead is found at Villach, in Carinthia.* 
The matrix is a limestone, of a pale brownish-grey colour, 
often more or less tinged with oxyde of iron. 
The ore is a heavy brittle substance, easily scratched with 
a knife, and of a yellow, varying from pale yellow to orange 
colour. 
The fracture is sparry. 
The external lustre is like that of wax, and when crystal- 
lized, two of the faces of the crystals are commonly opaque, 
and of a pale yellow, but the remaining four faces or sides 
have a resinous appearance. 
It generally exhibits an appearance of crystallization, and 
the crystals, when perfect, afford various modifications between 
the octoedral figure and the cube. 
The specific gravity of a specimen, from which I had se- 
parated all the visible part of the matrix, was 5092 (the tem- 
perature of the water being 6 o°), but when the ore was re- 
duced to powder, and purified by diluted nitric acid, I found 
the specific gravity to be 570 6. 
1 . When the ore was examined by the blow-pipe, it at first 
split and crackled as soon as the point of the flame touched it, 
but afterwards readily melted into a dark coloured mass, in 
which were some shining globules of lead. 
2. With borax it formed a brownish-yellow globule, but 
when it was in a small proportion, and heated by the interior 
* It is said to have been sometimes found in Austria and Hungary, but I doubt if 
the nature of these ores is the same. 
