INDEX. 



1257 



rage. 



Dittmar, William, on ocean, volume of 942 



on sea salt, amount and composition of . _ 942, 943 



on sea water, composition of. _ 794 



on sodium in the ocean, amount of 997 



Doelter, C, on gold, solubility of 1089-1090 



on sulphide minerals, artificial production of _ . . 1114 



on sulphides, solubility of. 1106,1107 



on zeolites, solubility of, in water _ _ 112 



Dolomite, alterations and alteration products of. 241-242, 



373.382,407 



chemical and physical constants of 197,237 



cherty, features and origin of 816-820 



formation of, from limestone, volume change 



involved in __ 209 



formation of diopside from, chemical reaction 



involved in__ 822 



formation of tremolite from, chemical reaction 



involved in._ 822 



sources and modes of formation of 238-239, 



240-241, 370, 379, 380, 408, 624-625, 798-808 

 Dolomite and quartz, alterations and alteration 



products of _. 382,407 



Dolomitization, conditions of . _ 802-808 



magnesium for, source of 802 



occurrence of, at sea bottom. 802-804 



subaerial ... 804-808 



Don, J. E., on gold deposits of Australia 1170,1185 



on gold ores and sulphides, association of . . 1095-1096, 



1099 

 on occurrence of gold at intersection of quartz 



veinsand carbonaceous shales.. . 1094-1095 



Douglas, James, on copper deposits of Arizona 1086, 



1183,1184,1188 



on gypsum in Arizona mines __ 1141-1142 



on oxysulphurets ._ 1165-1166,1182 



Doveton, G.D., Purington, C. W.,and Woods, T.H., 

 on occurrence of rhodonite at the 



Camp Bird mine, Colo 111:5-1116 



Dry mines, mistaken inferences concerning 1063-1065 



Ducktown, Tenn., copper deposits at, secondary en- 

 richment of 1182,1188-1189 



Dudleyite, formation of. 345 



source of 370,387 



Dynamic action, metarnorphic effects of _ 42-43 



Dynamic metamorphism, definition of 47 



use of term, discussion of _ ._ _ 763 



E. 



Earth, specific gravity of, discussion of facts bear- 

 ing on _ 364-365 



Earth movements, effect of, on temperature of 



ground water ._ 590 



Earth's crust, chemical composition of 192-193, 933-94S 



deformation of _ 1005-1014 



density of 933 



elements in, order of abundance of, compared 

 with order of abundance of elements 



in meteorites : 917 



relative abundance of _ 192-193 



movements of, in mountain making, discussion 



of 924-931 



percentage of known matter of globe formed by. 933 



Earthworms, effect of work of, on soils 448, 456 



Eldridge, G. H., on origin of phosphates 976,977 



Elements (chemical) in earth's crust, percentages 



of, tables showing _ 193,934,936,938 



in earth's crust, relative abundance of 192-193 



Page. 



Elements (native), occurrence of, as minerals 212 



Elkhorn mine, Mont., ores formed beneath imper- 

 vious arches in __ 1214 



Emerson, B. K., on fusion of schist by granite in 



Massachusetts 735-736 



on minerals formed by igneous intrusion 717,718 



on peripheral structure 716 



on porphyritic gneisses __ 705 



Emmons, S. P., on carbonic acid in underground 



waters 1128 



on mineral veins at Butte, Mont 1081 



on ore deposits, genesis of 1183, 1200, 1206 



on ore deposits of Butte district, Mont 1182-1183, 



1203, 1205 



on ore deposits of Delamar mine, Nev 1178-1179 



on ore deposits of Lead ville district, Colo . . 1168-1169, 

 1186,1204,1214 



on ore production from igneous rocks 1043 



on psephites of Cordilleras, fluviate origin of . . . 854 



on secondary enrichment of ore deposits 1188 



on tellurides associated with gold ores 1119 



Endomorphic effect of igneous intrusion, definition 



of 648 



Endomorphism, definition of 648 



Energy factors of zones of metamorphism, consid- 

 eration of 170-171 



Enlargement of minerals in rocks by deposition of 



new matter, discussion of 619-621 



Enophite, source of... 347,370,380 



Enstatite, alterations and alteration products of ... 268 

 269,373,382,397,404 



chemical and physical constants of 197,267 



sources and modes of formation of _ 268, 



302, 304-305, 307, 367, 370, 386, 390 



Enterprise mine, Rico, Colo., ore deposits at... 1084, 



1208,1215,1229 



Environment, adaptation of minerals to 33-35 



importance of , in metamorphism 42 



Epeirogenic movement, influence of, on ground- 

 water level. 426 



Epidote, alterations and alteration products of . . . 322-323, 

 373,382,383,398 



chemical and physical constants of _ 197,320 



occurrence and associations of 321 



sources and modes of formation of 255, 



260, 263, 264, 265, 273, 274, 275-276. 285, 288, 303^ 

 305, 312, 313, 321, 339, 340, 341, 342, 353, 354, 370, 

 377, 378, 379, 381, 382, 383, 384, 385, 387, 389, 390, 

 391, 394, 396, 39S, 399, 401, 402, 404, 405, 406, 625 

 Epidote group of minerals, character, occurrence, 



formation, and alterations of 320-323 



hydration of , degreeof... _ 625 



Epistilbite, chemical and physical constants of... 197,330 



occurrence of _ 331-333 



sources and modes of formation of 332, 



370,375,377,397 



Equilibrium, chemical, notes on . 90 



Erosion, belts of ores deposited at different levels 



inconsequence of 1139-1140 



Eucryptite, chemical and physical constants of 197 



source and mode of formation of 281, 370, 392, 405 



Evaporation, influence of, on ground-water 



level 425-426 



Exomorphic effect of igneous intrusion, definition 



of - 648 



Exomorphism, definition of. 648 



Expansion reactions, discussion of. 631-643 



