SUBJECT INDEX 



685 



Diatomite, 15, 491 



Differential settlements, 175, 176 



Differential thermal analysis, 127, 474 



Dikes, 96, 294, 298, 319, 332 



Diopside, 530 



Diorite soils, 47 



Dip, effect of, on slides, 238 

 initial, 11 



Direct shear, 100, 152, 177, 186 



Discharge of streams, 64 



Disintegration, mechanical, 4 



Dispersion patterns, 537, 539 



Displacement cell, single-core, 594 



Displacement method of constructing 

 levees, 222 



Dissipation of heat, 260 



Dissolved-gas drive, 582 



Dissolved materials, solubility, relation- 

 ships of, 30 



Distance wheel, 357 



Distribution, grain-size, 22 

 of foundry sands, 481 



Disturbed samples, 99 



Disturbing moment in stability analysis, 

 104, 139, 243 



Diversion dam, 430 



Docena Mine County, Ala., 387 



Docking facilities, 659 



Doe Run, Mo., 531 



Dolomite, 21, 132, 166, 457, 525, 530, 

 534, 561, 616, 638 



Donaldson ville, La., 219 



Double- tube core barrels, 152 



Drain holes, 158 



Drainage, 191, 195, 220, 243, 645 

 equilibrium, 596 

 in permafrost areas, 258 



Drainage-displacement technique, 598 



Drainage galleries, 201 



Drainage structures, 220, 226 



Drainage tunnels, 242 



Drainage wells, 158 



Drawdown,. 191 



Dredges, 267, 292 

 Ruth, 372 



Drill cuttings, 117, 171 



Drill holes, 171, 203, 206, 263, 560, 575 



Drilling, recovery, 152 



Drilling muds, 472, 608 



Drilling-time logs, 566 



Drilling wells, 118 



Drop hammer, 171 



Drop structures in debris control, 341 

 Droughts, effect of, on erosion, 408, 410, 

 424, 427 



recurrent, 397 

 Dry Branch, Ga., 467 

 Dry compressive strength, 468, 469, 479 

 Dry density, 611 

 Dry permafrost, 251 

 Dry permeability, 479 

 Dry strength, 101 

 Dry weight, optimum, 645 

 Drying shrinkage, 469 

 Ducktown, Tenn., 515 

 Duluth, Minn., 297 

 Dune sands, 12, 284, 482, 643 

 Durability of aggregate, 459, 481 

 Dutch clay polders, 44 

 Dutch East Indies, 661 

 Dynamic measurements, 173 

 Dynamic principles, of carbonate poros- 

 ity, 617 



of gully cutting, 416 



of harbors, 300 



of irrigation canals, 365 



of sediments, 3-40, 286, 617 



of sheet erosion, 402 



E 



Earth, age of, 90 



in areas of permafrost, 265 



internal constitution of, 89 



magnetic field of, 80 



rotation of, 19 



shape of, 90 



temperature of, 259 

 Earth dams, 181-192 

 Earth flow, 108, 135, 230, 242 

 Earth levees, 319 

 Earth materials, engineering properties 



of, 636 

 Earth stresses, 94, 96 

 Earth-tunnel jobs, function of the geolo- 

 gist in, 206 

 Eccentricity of the earth's orbit, 261 

 Echo ranging, 657 

 Echo-sounding equipment, 352 

 Economic geology, 234, 485-555 

 Economics, of foundations, 178 



of gully problem, 413 



