1252 



INDEX. 



Page. 

 Cementing materials in belt of cementation, distri- 

 bution of 628 



distribution of elements in 627-628 



i precipitation of, principles of 629 



similarity of, to rocks cemented - 628 



Centrosphere, definition of term 31,658 



Cephalonia, sea mills of, cause of water power of— , 149 



Cerargyrite, production of, equation showing 1167 



Chabazite, alterations and alteration products of .. 334, 



373.380,401 



chemical and physical constants of 196, 331 



occurrence of_ 331-333 



sources and mode of formation of 262, 



298, 299, 369, 375, 377, 384, 398, 399 

 Chalcedony, alterations and alteration products 

 of 



222 



sources and mode of formation of _ 222, 



273,369,389,400 

 Chalcedony and chert, alterations and alteration 



products of 380 



Chalcocite, alteration of, to metallic copper, equa- 

 tion showing 1158 



production of copper from, equation showing ._ 1158 

 production of, from cuprous and cupric sul- 

 phates, equations showing reactions 



for 1111 



reactions involving 1162, 1163, 1164 



zone of deposition of 1160 



Chalcopyrite, reactions involving 1161,1162,1163 



zone of deposition of 1160 



Chalk, pore space in, amount of . . , 125 



Challenger expedition, citations of scientific results 



of 794, 942, 943, 944, 964, 967, 974, 991, 997 



Chamberlin, T. C, on carbon dioxide drawn from 



interstellar spaces by gravitation . . _ 973 

 on carbon dioxide in air and in the ocean, bal- 

 ance between 968 



on climatic effect of increased amount of carbon 

 dioxide in atmosphere caused by use 



of coal 464 



on ground water, systems of 578 



on hydrogen in atmosphere 954 



on hydrogen sulphide in artesian waters issuing 



near Lake Michigan 607 



on hydrosulphuric acid in artesian waters. . 1112-1113 



on loess of Mississippi Valley 501 



on minerals associated with lead and zinc ores.. 1144 



on ore deposits of southwestern "Wisconsin 1220 



on organic matter as an agent in reducing and 



precipitating oxidized products . 1157,1158 

 section cited from, showing requisite conditions 



for artesian wells . 577 



Chamberlin, T. C, and Salisbury, R. D., on size of 



particles of loess 4:33 



on thickness of residual clay in upper Missis- 

 sippi Valley 530 



Chandler iron mine, Lake Superior region, figures 



showing occurrence of ores at 1196 



Chapman," R. M., aid by, in mathematical computa- 

 tions ---- 29,208,210 



Chemical action, importance of heat in 105-110 



metamorphic effects of 45-46 



production of heat by 54 



relation of, to mechanical action and heat 110-113 



through solutions, definition of 66 



Chemical changes in earth's crust, temperature ef- 

 fects of.. - 1013-1014 



Page. 

 Chemical composition of rocks, changesin. 507-518,764-766 



changes in, variation of, with porosity 655-656 



effect of, on rate of weathering. 532-533 



importance of, in metamorphism 359 



use of, as criterion for discriminating metamor- 

 phosed sedimentary and igneous 



rocks __._ 914-915 



Chemical composition of earth's crust, discussion 



of. 192-201 



Chemical compounds, heat of formation of 106 



Chemical effects of heat, discussion of 56 



Chemical elements, distribution of, as affected by 



metamorphism 932-1003 



in earth's crust, percentages of, tables showing. 934, 



936, 938 



redistribution of 947-1003 



relative abundance of 192-193 



Chemical energy, metamorphic effects of 45-46 



Chemical precipitation, ore formation by... 1037 



Chemical reactions, categories of, in zone of kata- 



morphism 161-162 



complementary, examples of 204,206 



effect of pressure on 100-104,168 



heat involved in 106 



reversibility of 87-90,110-111 



equations illustrating 88,110 



speed of increase in, with increase of tempera- 

 ture 107-108 



stoppage of, by pressure and heat generated by 



the reaction s themselves . _ 89 



thermal aspects of, in zones of nietamorphism . . 182 

 volume changes consequent on, energy factors 



involved in _ 170-171 



principle applicable to 209 



table showing, as applied to minerals 375-394 



Chemical solutions, increase of solubility of, with 



increase of heat 116 



Chemical work, combination of, with mechanical 



work, in nietamorphism 495-49ii 



in belt of cementation, discussion of 602-646 



in belt of weathering, agents and their work 



in.. 451-488 



in metamorphism, combinations and relations 



of, to mechanical and igneous work. 653- 

 655 



in zone of anamorphism, discussion of 675-706 



Chemical-physical factors on which nature of alter- 



tions depends _ 359-365 



Chemical-physical principles applicable to action of 



ground water 65-123 



Chert, alterations and alteration products of _ 222 



concretionary, photomicrograph of 836 



definition of 816 



deposits of, origin and features of 847-853 



ferruginous, origin of 829,S30-831 



sources of 222,389,400 



Chert and chalcedony, alterations and alteration 



products of _. 380 



Cherty limestones, weathered forms of 529 



Cherty limestones, dolomites, and marbles, fea- 

 tures and origin of _ 816-820 



Chicago, artesian wells at, conclusions drawn from 

 flow of, as to friction of water flow in 



Potsdam sandstone 587 



loss of head of artesian waters at 142 



Chicago, University of, aid by students of 29 



Chile, nitrate deposits in 543 



