154 Mineralogy and Geology of a part of Nova Scotia. 
formed on the surface of the fluid, which was the sulphur 
extricated from the ore. When cool, the contents of the 
matrass being diluted with pure water, and carefully washed 
from its surface, were thrown on a filter of known weight. 
The precipitate corewen on its surface, washed with dilute 
was added to the filtered solution. . The sulphur then in two 
hundred grains amounts to thirty-six grains, or eighteen per 
CONS... inennuck OE 
C. The liquid which had passed the filter was of a bluish 
een color, and transparent. It was divided into two equal 
quantities. In one portion a polished cylinder of iron was 
immersed, and “in orty-eight hours the copper had precipi- 
tated upon it in a dendritic form. That it had entirely sep- 
arated the copper was known by the solution ceasing to give 
a tarnish of copper to a polished steel instrument. The 
copper removed from the cylinder of iron, washed and dried 
sapidly to prevent oxidation, was found to weigh 79.5 grains. 
D. The other half of. the solution was treated with aqua 
ammoniz to excess of saturation, when a muddy brown pre- 
cipitate took place, which, when collected on a double fil- 
ter of known weight, washed, dried, and ignited with a little 
wax in a platinum crucible, was reduced to the protoxide of 
iron attractable by the magnet, and weighed 3.4 grains, indi- 
cating 2.5 grains of metallic wony.) 20): id 82° 
__E. To determine whether the solution was equally divided, 
and to prove the corre of the process C. th iated 
s n was saturated and acidulated with sulphuric acid, 
plate of polished iron immersed in it. The copper pre- 
Ei: 
+ 
 cipitated ina_brilliant metallic coating, and when separated, 
washed and dried, weighed with the loss of a trifling fractions 
like the result of the former process 79.5 grains, — : 
_ This ore contains, then, in a hundred parts, sisted 
Sin 2oPOPROMs ). ative east : 2 C 79,5 | 
pio dpbaty:... aces ad itedbcteay bi Bic BOgase 
es Tron, gt . es ie - (D) 19 DQ Grraty 
2 ee: ea 
4 ba ee ae , Se 
100A: 
. 
