1248 



INDEX. 



Page. 



Augite, source and mode of formation of 272, 



286,289,369,385,40s 

 Augite, siderite, and magnesite, alteration products 



of _ 3T8.408 



Austin, L. W., and Thwing, C. B., on volume of 



water at different temperatures 147 



Australia, gold fields of, secondary enrichment in 



1185-1186 

 ore deposits of, influence of organic matter of 



wall rock on deposition of 1087-1088 



Axinite, chemical and physical constants of 195,323 



occurrence of -- -- 323-324 



Azurite, formation of, from malachite 1159 



B. 



Bacteria, work of, in disintegrating plant and ani- 

 mal remains 455-456,457 



work of, in plant growth - -- 452,453 



Bain, H. F., figure cited from.. 1156 



on chert heds of Missouri _ . - - 851 



on dolomitization of limestone by ascending 



waters 800,807 



on lead and zinc ores of the Mississippi Val- 

 ley. 1145,1208 



on precipitation of lead and zinc ores by min- 

 gling of solutions- -. - 1114 



on precipitation of lead and zinc ores by organic 



matter 1111,1114 



on reduction and precipitation of oxidized prod- 

 ucts by organic matter.. 1157 



on secondary enrichment of ore deposits 1188 



on secondary sphalerite in the Joplin district. . . 1152 

 Bain, H. F., and Calvin, Samuel, on dolomitization 



of limestone 800 



Ball, S. EL, aid rendered by, in measurement of 



grains of sandstone 861 



on density of saturated solution of sodium chlo- 

 ride 147 



on granulation of anorthosite 675 



on size of grains of feldspar in original and gran- 

 ulated rocks 739 



on size of particles of sand composing sand- 

 stone 892 



Bancroft, G. J., on precipitation of gold by tellu- 



rides 1097 



on tellurides in the Kalgoorlie district of West 



Australia 1119 



Banner mine, California, vein quartz from, figure 



of -.-- 1156 



Barium, percentage of , in earth's crust 936, 1002 



Barium oxide, percentage of, in earth's crust 938 



Barker, G. F., on capillary and molecular attrac- 

 tion - 150,151 



on strength of surface tension of water 150 



Barlow, A. E., on fusion of sedimentary rocks 734 



Barlow, A. E., and Adams, F. D., on schist-conglom- 



• erates.-- --- - . 859 



Barometric pressure, influence of, on ground-water 



level. 428 



Barus, Carl, on decrease of volume of glass and hot 



water on solution 78 



on miscibility of water with rock magma.. 723 



on nonaction of steam on diabase. _ 493 



on potentialization of energy in strained niin- 



erals-... 96,691 



on solubility of glass in water 79,80, 



112, 630, 637, 692, 723, 740, 749, 750 



Page. 

 Barus, Carl, on temperature increase with increase 



of depth 593 



on temperatures required for aqueo-igneous 



fusion ._ _ _ ._ 729 



Basalt, losses in, by weathering, analyses showing. . 509, 



515,522 



Bascom, Florence, on devitrification 247 



on use of term "apo" 776,777 



on weathered dikes '.... 527 



Basement complex, rocksof, hypotheses as to origin 



of 37 



Bases, definition of 84 



strength of, dependence of, on degree of dissocia- 

 tion. 94 



strong and weak, discussion of 92 



substitution of, alterations produced by 408 



Basic salts, instance of 84 



Bastite, chemical and physical constants of 195 



sources and mode of formation of 268,270, 



275, 278, 282, 285, 286-287, 288, 290, 369, 

 375, 378, 379, 381, 382, 391, 398, 399, 404 



Bauxite deposits, formation of 1037 



Bayley, W. S., on arkose-gneiss deposits of Lake 



Superior region 876 



on biotite and chlorite, mutual replacement of 179-180 



on fusion of rocks on Pigeon Point, Minn 732, 733 



on schist-conglomerates 860 



on schists of Lake Superior region _ 904 



on water content of rocks as affecting granula- 

 tion and recrystallization 743 



Beaumont, Elie de, on ore production by gaseous 



solutions 1053 



on origin of pegmatites ._ 722 



term "agents mineralisateurs" first used by ... 59 



Beck, R., on formation of cassiterite 1127 



on igneous origin of certain ore deposits 1049-1050 



on ores deposited from gaseous solutions 1054 



Becke, F., chemical reactions given by 261,264 



on alteration of olivine to anthophyllite 310 



on alteration of orthoclase and plagioclase to 



albite and other minerals 264 



on enlargement of mineral particles. 644 



Becker, G.F., figures cited from 643,882 



on bowlder-like masse3 produced by weather- 

 ing 527-528 



on consolidation of rocks... 596 



on contact metamorphism 715 



on precipitation of mercury sulphide 1 109 



on serpentinization 219,646,881 



on solubility of gold 1090 



on solubility of sulphides 1106 



on strain, flow, and rupture of rocks 600,753 



on Witwatersrand banket 1041 



Bedding partings, size of 138 



Bedding planes, importance of, in ground-water 



circulation 130 



Bell, Robert, on volume changes in rocks by weath- 

 ering 524 



Beltof cementation, weathering. See Cementation; 



Weathering. 

 Belt, Thomas, on rock decomposition in tropical 



regions 476,530-531 



Beudigo gold district of Australia, ores formed be- 

 neath impervious arches in 1212-1213 



Berea sandstone, strain in, shown by quarrying 598 



Berlanite, source and mode of formation of .. 347,369,3S0 

 Berthelot, Marcellin, on production of heat in 



chemical changes 106-107 



