1 72 



fNDEX. 



Gold, conditions under which it is 

 found, 55, 56 



in Africa (South), 56, 58 



in America, 59 



in Asia, 58 



in Australasia, 57, 58 



in India, 58 



in Nevada, 59 



dry assay for, 1 15 



film on, 9 



wet assay for, 12 1 

 crossan, 7 

 Granite, 13 



age of, 14 



composition of, 99 

 Graphite, 84 

 Graptolite, 17, 1 8 

 Grass Valley lodes, 8 

 Greensand, 1 6 

 Grit, 13 



Guiana, British, gold in, 6ia 

 Gunter's chain, 132 

 Gypsum, 86 



63 



Hanging wall, 8 

 Hannans, 58 

 Hardness, scale of, 36 

 Heliotrope, 97 

 Honeycombed quartz, 7 

 Horn quicksilver, 7 1 

 Horn silver, 76 

 Horneblende, 103 

 Horneblende schist, 13 

 Hyacinth, 97 



IGNEOUS rock, 13 



Inaccessible place, to find the 



distance from an, 135 

 Incrustations on charcoal, 27, 29 

 India, borax in, 87 



diamond fields of, 90 



gold in, 58 

 lolite, 96 

 Iron hat, 7 



tests for, 27, 28, 29, 62 



Iron ores, 62 



arsenical pyrites, 63 

 brown ore, 64 

 copperas, 65 

 iron spar, 65 

 magnetic pyrites, 62 

 spathic, 65 

 specular, 63 

 titaniferous, 66 

 occurrence of, 66 

 pyrites, carrying gold, 62 

 rich deposits of, in Spain, 62 

 stains on the cupel, 118 



JADE, 97 



J Jargoon, 97 

 Jasper, 97 

 Joints, 19 



J^AOLIN, 102 



Kimberley, diamond mines 



of, 90 

 Kupferaickel, 72 



LAKE SUPERIOR, copper ore 



of, 49 



Lapis lazuli, 97 

 Laurentiari rocks, 17 

 Lead from galena, 127 

 Lead ores, 66 



carbonate of, 67, 77 



chromate, 68 



galena, 67 



pyromorphite, 68 



sulphate, 68 



at Leadville, 69, 77 



stains on the cupel, 118 



tests for, 27, 28, 29, 30, 66, 

 109 



dry assay for, 119 



wet assay for, 121 



