294 A. LIVERSIDGE. 
seems to expel arsenic vapour and this condenses on the inside of 
the tube, but it is difficult to watch the operation because, the 
atmosphere of arsenic vapour used for producing the alloy also 
condenses on the sides of the tube soon after its removal from 
the lamp. 
This specimen on cooling was of a dull brown colour just like 
‘the moss gold from mispickel, very hollow and blown out into a 
secondary globule on one side, the cavities contained spicules and 
spirals of moss gold. 
It was very brittle and on cutting it with a sharp chisel more 
or less powder was produced, the fracture was coarsely crystalline 
and of a dull gold colour, which under the microscope was seen to 
be intermingled with grey. On cupellation it lost weight = 3:27 
of arsenic. 
ELaxpervment 10.—In this case a weight of 7°3674 g. of fine gold 
was alloyed with arsenic; on the gold first fusing down or “ burn- 
ing” in the arsenic vapour a very fusible alloy was formed, but 
this like the last became less fusible as more arsenic (solid) was. 
pushed into it (the arsenic had been previously sublimed in glass. 
tubes for this purpose) and on cooling it lost its metallic lustre,. 
became covered with cauliflower-like growths and spirted a good 
deal ; the cavities contained the usual spicules and spirals of moss. 
gold. On cupellation the loss was equal to only 2°87 of arsenic. 
EHapervment 11.—This arsenide was of the colour and lustre of. 
freshly cast bronze. Loss=5:9%/ As. on cupellation. 
Experiment 12.—Also of a bronze colour. Loss= 4:9 of As. 
Experiment 13.—Of a bright gold colour and matt lustre ; 
this had formed directly in contact with the arsenic and had 
solidified on the arsenic itself—the alloy was pitted in places and — 
had a very strong resemblance to a nugget. Its fracture showed 
a few grey streaks mixed with the gold, on cupellation it lost 
weight =9-97 arsenic. 
Experiment 14.—The moss gold obtained by roasting the 
auriferous mispickel from the New Reform Mine, Lucknow, was 
cupelled with lead when 2°3668 grammes lost :057 or 1-987. 
