SUBJECT INDEX 



703 



Soil samplers, 99, 172 

 Soil science, 94 



Soil stripes in permafrost areas, 256 

 Soil testing, 49, 99, 129, 143, 544 

 Soldier Summit, Utah, 237 

 Solinuction, 135, 230, 250, 255 

 Solomon Islands, 650 

 Solomonsville, Ariz., 409 

 Solubility relationships of dissolved mate- 

 rials, 30 

 Soluble rocks, 159 

 Soluble salts, 462 



Soluble sedimentary rocks, bearing ca- 

 pacity of, 166 

 Solution, 4, 7, 16, 138, 619 



gas-drive, 581 

 Solution channels, 158, 627 

 Sonar gear, 660 

 Sorting, 10, 25, 115, 440, 454, 605 



degree of, 10 



relation of, to ground water, 118 

 Sound in water, 353, 657 

 Sources, of sediment, 5, 383 



of subsurface data, 560 

 South Africa, 521 

 South America, 42, 513 

 South Carolina, 194, 382 

 South Dakota, 121, 382, 446 

 South Fuller ton Field, Tex., 625 

 South Pacific, 456 

 Spacing of oil wells, 580 

 Spain, 443, 528 



Specific gravity, 116, 153, 439, 458, 461 

 Specific heat, 260 

 Specific retention, 114 

 Specific yield, 114 

 Spectrograph, emission, 622 

 Spectrographic analysis, 85, 548, 622 

 Sphalerite, 515 

 Sphericity, 233 



Spillways for dams, 155, 182-190, 428 

 Spinel, 489 



Spits and bars, 29, 281, 643 

 Spitzbergen, 250 

 Spodumene, 489 

 Spokane, Wash., 485 

 Spore material, 28 

 Spot tests, 177, 549 

 Spring Creek Dam, Colo., 451 

 Springs, submarine, 17, 21 

 Squeezing ground in tunnels, 194, 200 



Stability, calculations of, 153, 229, 242 

 of beaches, 276, 278, 659 

 of slopes and banks, 96, 102, 132, 136, 

 142, 153, 191, 219, 223, 232, 241, 

 264, 638, 651, 653 

 of till, 13 

 Stabilization, 648 



by electric current, 110, 242 

 of gullies, 400, 425 

 Stagnant water, 21, 27 

 Staining techniques, 622 

 Stand-up time in tunnels, 193, 200 

 Standard deviation, 605 

 Stanolind Oil and Gas Co., 616 

 State of reduction, 21 

 Statistics for production of sedimentary 



minerals, 486 

 Staurolite, 475, 572 

 Steam-jetting piles in permafrost area, 



267 

 Stilling basin for dams, 184, 185 

 Stone rings in permafrost, 250 

 Stone stripes in permafrost, 250 

 Storage capacity of reservoirs, 396 

 Stratification, 11, 25, 107, 203, 241 



relation of, to foundations, 151 

 Stratigraphic section, 573 

 Stratigraphy, relation of, to seismograph 



work, 84 

 Stream, 21, 49 



cross section of, 66, 68 

 Stream-bank erosion, 319, 335 

 Stream-channel control, 36, 319, 383 

 Stream-channel erosion, 383 

 Stream deposits, as source of aggregate, 



445 

 Stream-discharge velocities, 398 

 Stream loads, quantitative data on, 380 

 Strength, 95, 96, 126, 141, 148, 231, 239, 

 638 

 field tests of load of concrete with rock, 



157 

 of aggregate, 439, 459 

 of foundation, 148, 222 

 of loosely consolidated sediments, 33 

 shearing, 97, 154, 184; see also Shearing 

 strength 

 Stress, 95, 232, 239, 243, 264 



in pore fluids, 97 

 Strontium, 491 

 Structural geology, 127, 560 



