INDEX. 



ADITS, to find the length of, 135 



' Africa, gold in, 59, 60 

 Africa, diamonds in, 90 

 Agate, 97 

 Alabaster, 86 

 Alaraandine garnet, 96 

 Alexandrite, 97 

 Alum, 8* 

 Alumina, test for, 31 



detection of, 29 

 Aluminium, 40 



plate, 26 

 America, gold in, 54, 60 



silver ores in, 77 



coal in, 84, 85 



borax in, 87 



petroleum in, 86 

 Amethyst, characteristics of, 96 



oriental, 92, 95 

 Andesite, 13, 100 

 Anthracite coal, 84 

 Anticlinal curve, 15 

 Antimony, detection of, 26, 37, 89 



confirmatory test for, 30 



dry assay for, 120 



sulphide of, 42 



stains on the cupel, 118 

 Apatite, 36, 86 

 Apparatus, blowpipe, 24 



for the wet tests, no 



assaying, 115 

 Aqueous rocks, 13 

 Areas, calculation of, 132, 133, 



'34 



Arsenic, detection of, 29, 31 

 stains on the cupel, 1 18 

 Arizona, ruby copper ore of, 49 



Asbestos, 88 



Asphalt, 85 



Assay, different kinds of, no 



dry, for silver and gold, 115 



mechanical, 123 



ton, 113 

 Augite, 103 



Australasia, gold m, 57 

 Avanturine, 97 



B ALLARAT, gold deposits of 



57 



Banket, 58, 59 

 Baryta, sulphate of, 88 

 Basalt, 13, 100 



above gold deposits, 57, 59 



Batea, 51 

 Beauxite, 41 

 Beds of ore, 20 

 Bedrock, 2 

 Bellmetal ore, 81 

 Bendigo, saddle reefs of, 57 

 Beryl, 96 

 Bismuth, ores of, 43 



tests for, 29 

 Bitumen, 85 

 Bituminous coal, 85 

 Black Band, clay ironstone of the, 



66 



Black Jack, 82, 83 

 Black-lead, 84 

 Black oxide of copper, 47 

 Blende, zinc, 82 

 Bloodstone, 97 

 Blowpipe apparatus, 24 



