one A. LIVERSIDGE. 
The specimen was from a layer about three inches thick; the 
cones are fairly regular in size and shape, and run right through 
the deposit in vertical columns, like piles of small closely packed 
conical paper sugar bags; the average diameter being about half- 
an inch, and the length perhaps a little more, the angle of the 
cone being between fifty and sixty degrees, and incipient crystal- 
lisation is visible in parts. The upper surface of the deposit 
presents pits with thickened edges over some of the columns of 
cones, 
Mr. A. J. Sach, F.c.s., published an account of this deposit 
(with an analysis) in the Report of the Australasian Association 
for the Advancement of Science, Hobart Session, 1892, p. 328. 
MOLYBDENITE. 
This was described in Note No. 6, read before this Society, 
December 2, 1891, as occurring in large crystals 3 x 3} x 5} long 
from the Eleanora Mine, Kingsgate, near Glen Innes, N.S.W. 
Composition. ve 
MNO oi es, oe BT SL 
meee RO ee 
Tron ee ee ae eo ae 39 
100-81 100-28 
Another specimen yielded about 6°%/ of manganese oxide ; but 
this was probably mechanically enclosed between the plates of 
molybdenite. Sp. gr. 4:6. 
Proustite—Silver Sulpharsenide. 
ee ere Ty ee oe eer ae eee ote 
Mr. Edgar Hall, r.c.s., sent me, in August last, some specimens d 
from his United Mine at Rivertree, in which he had found som? 
minute red crystals. I have examined the crystals, and agree 
with him in regarding them as proustite. They are quite micro” 
scopic, and it is difficult to examine them and still more to separa? 
them from the matrix. 
Mr. Hall states that they occur in a narrow vein, about hal 
an-inch thick on the hanging wall, and that they have been 
