INDEX. 



1277 



Page. 

 Rocks, capacity of, for imbibition of water, an in- 

 dex to power of transmission _ 153 



deformation of, speed of .. 188-189 



diminution of volume of, methods of 101-104 



disintegration of, by changes in tempera- 

 ture 434-439 



expansion of, with increase of temperature, rate 



of. 



flow of, character and conditions of 748-759 



effect of, on textures and structures . 760-763 



mashing by ... 763-764 



relations of, to mountain making 934-931 



igneous, analyses of 934 



lossesof , constituents of , in belts of weathering 507-518 



metamorphic, nomenclature of 776-784 



openings in, capillary, flow of water in 138-143 



capillary, subcapillary, and supercapillary, 



sizes of 135-136,138,145-146 



diagrams showing form of... 133,133 



due to faults, joints, and fissility, relative 



size of 155 



form and continuity of 139-134 



influence of, on speed of water transmission 154-155 



percentage of rock occupied by 124-139, 146 



size of 134-146,155 



subcapillary 143-146 



supercapillary, flow of water in . . _ 137-138 



work of water in, variable in amount with 



variation in size 136 



pore space in, diagrams showing form of open- 

 ings constituting 132,133 



sedimentary, analyses of 938 



thickness, volume, and weight of 939-941 



solid, penetration of, by water 123 



Eolker, C. M., on tin deposits 1038 



Roots of plants, disintegrating effects of, on rocks. 444-447 



Rosenbuseh, H., on alterations of chlorite 347 



on definition of psammites 785 



on kalk-silikat-hornf else of the Harz Mountains. 823 

 on zonal arrangement of metamorphic minerals 



peripheral to intrusive masses 718-719 



Rossland, British Columbia, auriferous pyrite de- 

 posits of 1047 



Run-off, effect of agriculture on _. 415 



material abstracted from belt of weathering 



by 538 



Rupture of rocks by strain, discussion of 599-603 



Russell, I. C, on cause of red color of soils 469,483 



on chemical composition of alkaline earth car- 

 bonates of Lakes Lahontan and 



Bonneville 799 



on climatic changes in far "West in Pleistocene 



time 1178 



on deposits of Lake Lahontan 554 



on present formation of tufa deposits in salt 



lakes _ __ 793 



on preservation of original textures and struc- 

 tures in decomposed rocks ._ 536 



on subtuberant mountains 709 



Rutile, alterations and alteration products of 231,374 



chemical and physical constants of.. 200, 330 



sources and modeof formation of _ 227, 



328,230,331,355,371,379,385,388,393,396,405 

 Rutile and magnetite, alterations and alteration 



products of _ 391,405 



Rutile and siderite, alterations and alteration prod- 

 ucts of ._ 391,400 



Page. 

 Rutile, calcite, and quartz, alterations and altera- 

 tion products of ._ _ _. 391,407 



Rutley, Frank, on Paleozoic limestone beds, dwin- 



dlingand disappearance of... 524 



on whetstones of Arkansas ._ _ __ 853 



S. 



Sahlite, alterations and alteration products of 373, 



374, 275, 377, 378, 279, 374, 391, 399, 408 



chemical and physical constants of 200,271 



occurrence of _. 373 



origin of, from ankerite, chemical reaction in- 



volvedin.. 837 



sources and modes of formation of 242, 



243,272,371,376,407 

 Sahlite, siderite, and magnesite, alterations and al- 

 teration products of 391,408 



Salisbury, R. D., on loess of Mississippi Valley 501 



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



particles of loess ._ 433 



on thickness of residual clay in Upper Mississippi 



Valley 530 



Salt, common, amount of, annually removed from 



soil 486 



deposits of _ _ 789-790 



Salt Lake Valley, lands rendered alkaline in, by ir- 

 rigation 546 



Salton Basin, Cal., soluble salts in soil of 545 



Salts, acid, example of 84 



basic, example of. 84 



definition of _ 66 



dissociation of, in water... 73 



formation of, mode of 84 



in ocean, total amount of __ 943,944 



in sea water _. 942 



precipitation of, in belt of weathering _ 542 



soluble, amount of, contained in soils 545 



solution and abstraction of, in soils 485-486 



solutions containing, phenomena of. _ 116-119 



San Bernardino spring, amount of silica in water of. 572 

 San Joaquin Valley, Cal., lands rendered alkaline in, 



by irrigation __ 546 



San Juan mining district of Colorado, decrease of 



values with increase of depth in. 1186-1187 



depth of oxidation in _ 606,1181 



Lake vein in, variations in, with variations in 



character of country rock 1071 



ore deposits of 1304 



as affected by topography _ _ 1319-1220 



ore shoots in 1227,1228 



secondary enrichment of ores in 1186-1187 



wall rock in, influence of, on veins in. 1230 



Sand dunes, formation of _ 862 



Sand grains, size of smallest particles of 432-433 



Sandberger, F., on source of metals 1030 



Sands, ferromagnesian. deposits of, character and 



origin of __ 877-879 



pore space in __ 125 



Sandstones, analyses of 938 



casehardening of ._ 546-549 



character and origin of _ 860-865 



induration of surface of, by iron oxide 548-549 



photomicrograph of 872 



pore space in, amount of 124,126 



quarried, surface induration of, caused by evap- 

 oration of quarry water 549 



strain in, shown by quarrying _ 598 



