420 



GENERAL INDEX. 



Richmond mine, electrical "ictivity of I 



plan of drifts ind workings, 400 and 500- 

 foot levels ; 



plan of drifts and workings, 600-foot 



level : 



Richmond mine ore bodies, extent, horizontal, of I 



relative position of the I 



Kichthofen, F.von, conclusions as to the Comstock 



estimated yield of the Lode to the 



close of 1865 



his predictions verified 



on erosion ! 



on faulting : 



on fluorine and chlorine 20, ; 



on propylite 



on the alteration of minerals in situ. . 

 on the applicability of the ascension- 

 theory 



on the contents of the Lode 



on the continuity of the Lode in depth . 



on the east vein ] 



on the mode of occuirence of the Com- 

 stock 



on the probable character of the Lode 



in depth 



on the proportion of gold to silver in 



Comstock bullion 



on the quartz-porphyry 



on the rocks of the Washoe District. 



on the source of ore 



on widespread solfataric action 



report on the Comstock Lode 



Jlickai-d, R., data concerning the Eureka ore bodies S 



"W. F., analysis by ] 



Rock subjected to action of aqueous vapor, description 



of 2 



Rocks. (See Lithology.) 



assays of 1 



conductivity of , 341, 348, 3 



eruptive, means of determining succession of 1 



general character of the decomposition of the ... 2 



metallic contents of 2 



moisture of the 2 



occurrence and succession of the 188, 3 



of the District, typical character of the 3 



of the Washoe District 32,3 



of the Washoe District, Zirkel on the 



special localities of, in the Washoe District 



their relations to ore-deposits 



Washoe, disputed character of the 



which contain silver and gold 5 



Rock-chamber S 



difference of temperature of outside and 



interior of 300, 302, 3 



Rock Island, granite at the 34,1 



metamorphics in the 1 



Rock-masaes, concentric weathering of 3 



Rose Bridge Colliery, temperature observations in the . 245, 2 



Rosenbusch, H., on propylite 



Ronx's ranch (C. 5), assay of basalt from near 1 



basalt near 



felsitic quartz-porphyry near 



Sandberger, F. , on the lateral-secretion theory 3 



on the metallic contents of rocks 2 



Savage, analysis of clay from the table following 



page 151 



analysis of ore from the 153 



analysis of water from the 152 



assay of porphyritic diorite from the 154 



dioritc of the 96 



flood in the 232 



later diabase in the 199 



Savage and Gould «£ Curry, bonanzas of the 17 



Savage shaft, cross-section through the- 274 



Schemnitz, propylite of 90 



School statistics of Storey County 5 



Scorpion croppings {E. 2), position of the 193, 279 



Shale in the Richmond mine 334, 345 



Shafts, temperatures in various 391 



Sheep Corral Canon, propylite from 138 



Sheeted structure of country rock discussed 182 



on the C. <£ C. section 271 



Siena Nevada, assay of diabase from the 155 



cross-section through the .. _ 280 



earlier diabase in the 115,198 



eruptive diorite in the 99, 192 



later hornblendeandesite near the 204 



limestone in the 192 



Sierra Nevada Range, water from the 243 



Silica determinations of rocks 152 



Silicates, ferro-magnesian. decomposition of the 214,369 



Silver and gold, distribution of, in the Comstock 268 



in rocks compared with yield 224 



proportions of, in Comstock bullion... 6, 9, 18 



Silver City, basalt. iust we.st of 134 



railroad (C. 7), earlier hornblende-andesite 



from 123 



veins in hornblende-andesite near 201 



Silver Hill, eruptive diorite in the 192 , 



near the 104 



metamoi*phic diorite of the 196 



Silver Terrace (E.3), analysis of augite-andesite from 



table following page 151 



Silver traced to the augite of diabase 224 



Slate, assays of 155 



Slides, detailed description of 91 



method of reference to 145 



Sodalitein granite 34,92 



Solfataraa, von Richthofen on 19 



Solfataric action, age of the 206 



heat ascribed to 237, 389 



widespread, inthe Washoe District, von 



Richthofen on 21 



Solfataric gases, part played by, on the Lode 386 



Solutions iu contact, electromotive force of 357 



saline, in contact holes 357 



Skeers lead mine, electrical activity of 311 



Sperenberg boring, temperature observations in the.. 245, 256 

 Sphene. (See llmeuite and Titanite.) 



Statistics of mining in preparation by the Census 1 



school, of Storey County 5 



Steamboat Springs, solfataric gases of 240 



Valley, propylite from 138 



Storey County, school statistics of •'» 



Storm Canon, propylite from 84, 139 



Stratification, eruptive 182 



Stretch, R. H., mapping by 284 



Stringers from the Lode 220 



