triple Sulphur et, of Lead , Antimony , and Copper. 67 
green : it was made to boil, and in this state was added to three 
quarts of boiling distilled water, which immediately became like 
milk; this was poured on a very bibulous filter, so that the 
liquor passed through before it had time to cool ; and the white 
precipitate thus collected, being well edulcorated with boiling 
water, and dried on a sand-bath, weighed 63 grains. 
C. The washings were added to the filtrated liquor; and the 
whole was gradually evaporated at different times, between each 
of which it was suffered to cool, and remain undisturbed during 
several hours. A quantity of crystallized muriate of lead was 
thus obtained, until nearly the whole of the liquor was eva- 
porated : to this last portion a few drops of sulphuric acid were 
added, and the evaporation was carried on to dryness; after 
which, the residuum, being dissolved in boiling distilled water, 
left a small portion of sulphate of lead. 
The crystallized muriate of lead was then dissolved in boiling 
water; and, being precipitated by sulphate of soda, was added 
to the former portion, was washed, dried on a sand-bath, and 
then weighed 120.20 grains. 
D. The filtrated liquor was now of a pale bluish-green, which 
changed to deep blue, upon the addition of ammonia; some 
ochraceous flocculi were collected, and, when dry, were heated 
with wax in a porcelain crucible, by which they became com- 
pletely attractable by the magnet, and weighed 2.40 grains. 
E. The clear blue liquor was evaporated nearly to dryness ; and, 
being boiled with strong lixivium of pure potash, until the whole 
was almost reduced to a dry mass, it was dissolved in boiling 
distilled water; and the black oxide of copper, being collected and 
washed on a filter, was completely dried,. and weighed 32 grains. 
200 grains of the ore, treated as here stated, afforded, 
K 2 
