140
(7) Cupellation 142
Cupels 142
Cupellation temperature 143
Cupellation loss 145
(8) Inquartation 146
(9) Flatting 149
(10) Parting, in flasks 151
" in test tubes 152
" in glazed crucibles 153
" Loss, &c. 154
(11) Check assays, surcharge 154
(12) Bullion assays in special apparatus 156
Silver, &c., in gold bullion 157
(13) Sampling of base bullion, &c. 157
CYANIDES--Commercial cyanides 160
Double cyanides 161
Prussic acid 162
Gold-dissolving power of cyanide liquor 162
Assay for cyanide strength 163, 165
Assay of commercial cyanide 167
Alkalinity of cyanides 167
Acidity of ores 168
Metals in cyanide liquors 169
Cyanicides 169
PLATINUM 170
IRIDIUM 171
MERCURY 171
Dry assay 172
Wet method 173
CHAPTER X.
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