INDEX. 



A. C. Hue, Description of the 40 



, Stratified limestone near the 32 



Acid, Carbonic ; influence in cave formation 94 



Adams Hill, Altitude of 3 



, Condition of mining in 168 



, Position of 3 



Age of ore 105 



, Relative, of ore bodies and fissures 76 



Alps, Evzfiihrender Kalkstein in the 68 



Altitudes 2, 3 



American shaft, Kuby Hill fault at the 24, 28, 113 



, Main fissure at the 24,28,113 



Anglesite 53 



Aragonito, Formation of ; Roth and Dana 58 



, Measurement of crystals of 56, 57, 58 



Arizona mineral zones 117 



Arkansas, Deposits of 66 



Arsenic, Source of, in the ore 55 



Assays, Discussion of 85 



in connection with electrical experiments 142 



of Comstock rocks for G. F. Becker 124 



granite v -. 134 



of limestone, 1st list - 83,84 



,2nd list-..'. 84 



, 3rd libt 85 



, various 133, 134, 135 



of quartzite 133, 134 



of quartz-porphyry 136, 137 



of rhyolite 134 



, Use of 132 



Ashburner, "W. T. ; Testimony of Ill 



Assaying; action of bitartraU of potash on litharge ... 130 



country rock as a means of prospecting 144 



, Object of 120, 190 



; cupellation 126 



, Cupids used in 125 



; estimation of gold 131 



, Fluxusedin 124 



, Inaccuracies of results in 129 



litharge 123 



, Loss by cupellation in 126, 127, 128 



, Measuring buttons in 129 



, Use of 132 



, Weighing buttons in 129 



, Weights used in. 124 



Azurite 58 



Back limestone, Description of 49-183 



Banner mine, Fissure in the 73 



, Ores of the 63 



Barus, Dr. Carl; electrical experiments in the Rich- 

 mond 142,191 



Page. 

 Barns, Dr. Carl; on the electrical activity of ore 



bodies 146,147,148 



Basalt, near the mines, Absence of 89 



Becker, G. F. ; Assays of Comstock rocks for 124 



; on the electrical experiments of Dr. Bar- 



rus 142 



Bell shaft tunnel, Main fissure in the 30, 113 



Big cave, Dew point in the 57 



, Experiments in the 56,57,58 



, Roof of the 76 



, Temperature in the 57 



Big Cottonwood District 65 



Bitartrate of potash, Action of, on litharge 130 



Bliitte in the deposits of Raibl 08 



Blende 56 



Bristol District 65 



Buckeye claim 3 



Ore bodies of the 72 



Buel & Bateman organize Eureka Con. Co 3 



Bullwhacker mine in the Pogonip limestone 5 



, Lead in the 107 



, Quartz-porphyry in the . .136, 137, 138, 165 



Calamine 56 



Calcite 56 



California, Quicksilver belt of 117 



Cambrian, Ore deposits almost exclusively in the 5 



represented at Eureka 5 



Carbon in rocks, Determination of 135 



Carbonate of copper 58 



lead 53 



lime 56 



zinc 56 



Carbonic acid in cave formation, Influence of 94 



Carboniferous, Ore deposits in the 67 



represented at Eureka 5 



Caves, Action of water in 95 



as indications of ore 139 



, Climatic changes in regard to formation of 94 



, Connection of, with fissures and ore bodies 95 



, Connection of, with outer air 96 



, Depth of formation of 96 



, Formation of 189 



in Adams Hill 166 



in connection with ore 74, 186 



, Partially formed, and ore chambers 100 



, Relation of, to the formation of ore 99 



, Theory of the formation of 94 



Cerro Gordo District 65 



Cerussite 53 



Chamber, Potts 73,112 



Chambers, Arrangement of ore in 97 



(195) 



