SUBJECT INDEX 



705 



Tests, chemical, 173 

 clay, 474 



foundry sand, 476 

 grouting, 150 

 load, 176 

 materials, 153 

 permeability, 105, 588-590 

 pile, 99, 172 

 soil, 99, 132 

 Tetrahedra, in clay mineral structure, 55 



in stream-bank protection, 429 

 Texarkana, Tex., 220 

 Texas, 23, 382, 424, 569, 611, 624 

 Texas City, Tex., 296 

 Texture, 107, 232, 447, 571 

 Thaw, 6, 148 



in permafrost areas, 253, 263 

 test, 458 

 Thermal analysis, 474, 622 

 Thermal log (Fig. 1), between 560 and 561 

 Thermal resistance, 260 

 Thermokarst lakes, 263 

 Thermo-osmosis, 110 

 Thickness of water films, 234 

 Thin sections, 622 

 Thixotropy, 109, 468, 469 

 Thompson Creek, La., 219 

 Thorium, 565 



Threshold pressure, 594, 597 

 Thuringite, 510 

 Tidal currents, 19, 24, 294, 305, 306, 313, 



394 

 Tidal estuaries, 294 

 Tidal flats, 24 

 Tile, 490 

 Till, 13, 454, 545 

 Time, 10, 30, 43 



consolidation tests, 173 

 Tin, 488, 513, 542 

 Tinian, 642 

 Titanic, 78 

 Titanium, 488 

 Tokyo Plain, 647, 653 

 Tombigbee River, Ala., 333 

 Tooele Valley, Utah, 120 

 Top-set beds, 12 

 Topaz, 489, 572 

 Topofunctions, 7, 43 

 Topography, 17, 43, 47, 262, 339, 635 

 effect of, on environment, 17 

 of sea bottom, 659 



Toposequences, 47 

 Tourmaline, 475, 489, 572 

 Toxicity symptoms in plants, 543 

 Tractive force in stream, 69, 70 

 Trafficability, 268, 269, 643, 644 

 Trans-Pecos, Tex., 424 

 Transpiration of plants, 49, 397, 447 

 Transportation, 8, 62-71, 131 

 by wind, 9 

 of iron, 507 

 Treasure Island, Calif., 109 

 Trees in permafrost area, 253 

 Tremolite, 530 



Trenches for preventing slides, 242 

 Trenton, N. J., 293 

 Triassic, 131, 133 



Triaxial shear, 100, 173, 186, 190 



Tridymite, 442, 462 

 as aggregate, 442 



Trinity River, Tex., 382 



Tristate district, 532 



Trona, 492 



Tropical areas, 28, 53, 643, 648 



Troy, N. Y., 293 



Truckee River, Nev., 412 



Tsunamis, 19, 285 



Tuffs, volcanic, 15, 638 



Tularosa Valley, N. M., 427 



Tules in canals, 366 



Tulsa, Okla., 579 



Tundra, 253, 268 



Tungsten, 541 



Tunnels, 193-209 



Turbulence, 8, 10, 18, 22, 62, 71 



Turlock Irrigation District, 375 



Turtle Mountain, Alberta, 238 



Tygart Dam, W. Va., 164 



U 



Ulexite, 491 



Ultramicroscope, 57 



Ultraviolet light, 567 



Unconfined compression, 100, 154, 172, 



177, 186, 222, 240 

 Unconformities, 573 

 Underground military installation, 652 

 Underground water, 14, 113-123 

 Underwater sound, 656, 657 

 Undisturbed samples, 99, 102, 173, 192, 



203, 207, 224 



