About the Book
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920. Excerpt: ... INDEX Abrasives, 293 Acid, definition of, 16 porphyry, 172 Actinolite, 12 Adularia, 274 Africa, diamonds in, 294 Agate, 308 Ajo, Arizona, copper deposit, 168 Alabama, bauxite deposits, 241 graphite in, 278 Alaska, barite in, 267 Gastineau and Juneau gold mines, 148 Juneau gold belt, 147 prospector's methods in, 126 tin deposits in, 225 Alaskite, 212 Albite, 9 Almaden, Spain, mercury de-posits, 231 Alum, 263 Alumina, blowpipe test for, 85 Aluminum, 241 Alunite, 286 Alluvium, 44 Amalgam, 229 Amalgamation assay, 134 Amethyst, 311 Ammonia test for copper, 180 Amphibole, 11 Amphibolite-schist, 178 Analysis of an ore, complete, 88 of flame, 57 of ores, 84 Andesite, 10 Aneroid barometer, its use, 75 Anglesite, 185 Anorthite, 9 Anthracite, 272 Anticline, an, 248 definition of, 37 Antimonial--gold ores, 194 lead ore, 186 Antimony, blowpipe test for, 85 ore, assay of, 107 region where found, 193 Apatite, 263 Apparatus for field assaying, 112 Appendix, 313 Aqueous rocks, definition of, 33 Argentiferous ores, 157 Argentite, 154 Arizona, asbestos in, 266 Jerome copper deposits, 177 porphyry copper deposits, 168 quicksilver deposits in, 232 Superior, copper deposits, 177 Arkansas, manganese deposits in, 209 Arsenic, 265 Arsenical pyrite, 289. Arseno-pyrite, 266 Asbestos, 12, 266 Ashio copper mine, Japan, 178 Asphalt, 262 Assay furnaces, types, 98 of antimony ore, 106 of copper ore, 106 of lead ore, 106 of mercury ore, 107 of tin ore, 106 ton system, 102 Assaying ores, 97 outfits, suitable, 107 Assessment work, 328 Atolia, scheelite mine, Califor-nia, 215 Augite, 13 Australia, one of great gold regions, 115 use of rocker, 123 Austria, magnesite in, 282 ozokerite in, 261 pitchblende in, 219 quicksilver deposits, 231 Aztec gold mine, New Mexico, 149 Azurite, 171 Balances ...
