GENERAL INDEX. 



417 



Grnnow, W., galvanometer made by 298, 327 



Habitus, valne of, in rock determinations 85 



Hague, Arnold, analysis by 153 



Hague, J. D. , on the system of timbering in the mines . . 6 



Hale f£ Norcross, analysis of clay from the 



table following page 151 



analysis of water from the 152 



cross-section through the 276 



flood in the 232 



Hanging wall, rise of, a rare occurrence 179,378 



Hawes, G. "W., on the feldspars of the later hornblende* 



andesite 67 



Heat. {See Temperature.) 



casualties from, in the mines 3 



distribution of '. ■ . 230 



loss of, in the mines 229 



normal increment of 229 



of the Comstock, Church on the 31 



depth of the source of the, be- 

 low the surface 240 



explanations offered 231 



mines 3 



relations to surface rocks 241 



results of thermal survey con- 

 cerning 264 



phenomena of the lode 228, 387 



Heinrich, F., on the Sperenberg boring 245 



Henwood,W. J., on electricity of metalliferous veins. .309, 311 



History of mining on the Comstock, by E. Lord 1 



History of the Lode, Church on the 29 



Hoffmann &. Craven, mapping by 284 



Holzappel, v. Strombeck's experiments at 310 



Hornblende. (See illustrations.) 



H<.irulilende, black-bordered. (See illustrations.) 



characteristic of andesite .. 84 



brown, alteration to green 36 



decomposition of 74 



disseminated through groundmassof ande- 

 site 84 



formation of chlorite from 211 



foi-mation of pyrite from 210 



green, fibrous, chlorite mistaken for 84 



green, resulting from alteration of brown . 41 



speculation on the black border of 59 



with double black border 54,123 



with inclusions, probably of ilmenite 95, 98 



Horublendeandesite, earlier. {See illustrations.) 



analysis of table fol- 

 lowing page 151 

 coutaining finely dissem- 

 inated hornblende 120 



containing ilmenite 118 



description of slides of. . 116 



feldspars of 406 



lithological description of 53 



occurrence and age 199 



occurrence of ore in . - . 201 

 with disseminated horn- 

 blende 54 



with excess of augite ... 55 

 with very large horn- 

 blendes 57, 201 



later. (See illustrations.) 



analysis of. table fol- 

 lowing page 151 



27 c L 



Page. 



Homblende-andesite, later, description of slides of 130 



determination of 383 



Dewey on the feldspars of. 68 



feldspars of 153 



Hawes on the feldspars of 67 

 lithological description of. . 66 



occurrence and age of 203 



slight erosion of 203 



Zirkel on a feldspar in 69 



Horse, the great 267 



Horses, large, characteristic of upper levels, von Kicht- 



hofen on 22 



near surface, von Kicbthofen on 16 



produced by faulting 179 



Hydrosulphuric acid in Tellotv Jacket water 240 



Hmenite. (See illustrations.) 



decomposition of 215 



in earlier homblende-andesite 56, 118, 123 



lithological description of 145 



probable acicular inclusions of, in hornblende 38,40 



Imperial, diorite of ravine (C. 4.), west of the 41 



Inclusions, black, acicular. {See illustrations.) 



fluid, as diagnostic points 50 



containing salt cubes in cniptive diorite 37 



in homblende-andesite 121 



secondary. (A'eeillastrations.) 



secondary 79. 1 19, 371 



glass. (See illustrations.) 



double. (See illustrations.) 



occurrence in propylite 85 



Intensities, constancy of 341, 348 



observed on the 400-foot level of Richmond 



mine 338 



observed on the 500-foot level of Richmond 



mine 336 



Investigation, previous, of the Comstock Lode 12 



Johnson, S. "W., analysis by table following page 151 



Julia, assay of diabase from the 155 



earlier diabase near the 197 



flood in the 232 



Justice, bonanza of the 394 



Church on the 30 



croppings near the 278 



eruptive diorite in the 193 



metamorphic diorite of the 196 



ore bodies, probably of same age as the others . . . 220 



ore of the 219,220,225 



quartz-porphyry near the 33 



Kaolin, a hydrate 235 



heat of hydration of, unknown 235 



not identified in the rocks 216 



not prevalent on the Lode 78, 371 



reactions leading to formation of 234 



Kaolinization, criticism of the evidence that heat is pro- 

 duced by 232 



discussion of experiments on 304 



discussion of the theory of 233 



disposition of apparatus for 295 



errors in experiments on 308 



evidences of heat caused by 231 



experimental results discussed 304 



experiments on 236 



general plan of experiments 290 



heat evolved by 235 



heat of the Lode attributed to 231 



