COPPER, LEAD, THALLIUM, BISMUTH, ANTIMONY.
COPPER--Introductory 175
Dry assay 176
Valuation of copper ores 181
Wet methods 183
(1) Electrolytic assay 184
Volumetric methods 194
(1) Cyanide method 194
(2) Iodide method 199
(3) Colorimetric method 203
Examination of commercial copper 205
LEAD 211
Dry assay 211
Wet assay 213
(1) Gravimetric method 213
(2) Volumetric method 214
(3) Colorimetric method 218
THALLIUM 219
BISMUTH 220
Dry assay 221
Wet method 221
(1) Gravimetric determination 222
(2) Colorimetric assay 223
ANTIMONY 225
Dry assay 225
Wet method 227
(1) Gravimetric assay 228
(2) Volumetric method 229
CHAPTER XI.
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