Hydrate of Copper and Spodumene. 119 
blowpipe, it becomes black, but is infusible ; with borax it 
fuses into a glass of a bright green colour, and when heated 
with sub-carbonate of soda, yields globules of metallic cop- 
per. When treated with nitric acid, it is partly dissolved 
without effervescence, and affords a eofation of a blue col- 
our. 
~ Analysis. 
A. Two grammes of the mineral, after being carefully 
separated from the accompanying carbonate of copper, 
were reduced to an impalpable powder, and exposed dur- 
ing half an hour to a red heat in a platina crucible. The 
powder after igifition was of a black colour, and weighed 
1.660 grammes. The loss, by calcination, was, therefore, 
0.340 grammes in two grammes, or 17 per 100. 
B. The calcined mineral was then fused with three times 
_ its weight of crystallized carbonate of potash, and the fused 
“- mass, which was of a black colour,. was treated with mu- 
riatic acid in excess, and the solution evaporated to dry- 
ness; acidulated water was then added, and the whole 
thrown upon a filter. The silex separated in this manner, 
when washed and calcined, amounted to 0.745 grammes, 
or 37.250 per 100. 
C. To the solution in muriatic acid, caustic potash was 
added: in excess, and the fluid boiled. The precipitate 
which was formed after being washed and calcined, weigh- 
ed 0.903 grammes, and on examination proved to be 
pure peroxide of copper. These 0.903 grammes in 2 
srammes are equal to 45.175 per 100. 
D. In order to ascertain whether this mineral contained 
phosphoric acid, I dissolved a portion of it in nitric acid, 
decomposed the nitric solution by means of caustic potash, 
and treated the alkaline fluid with acetic acid in excess. 
The acetous solution, when tested by nitrate of lead, gave 
no indications of phosphoric acid. 
The constituents of this mineral, according to this anal 
sis, are, per 100 parts, 
