682 



SUBJECT INDEX 



Channel sedimentation, 392 

 Charts, 661 



Cheat River, W. Va., 157 

 Check dams, 342, 368 

 Chemical action, 15, 21, 440 

 Chemical analysis, 173, 543, 622 



of soils, 538 



sampling for, 543 

 Chemical deposits, 31, 491 

 Chemical properties of aggregates, 437- 



463 

 Chemical reaction in cement, 442 

 Chemical solution, 4, 7, 618 

 Chemical weathering, 5, 55, 255, 537 

 Chert, 31, 131, 444, 519, 622, 629 

 Chesapeake Canal, 306 

 Chicago, 111., 297 

 Chief of Engineers, 181, 282, 642 

 Chile, 528 



Chinchina, Colombia, 53 

 Chinle Wash, Ariz., 423, 429 

 Chippewa River, 329 

 Chlorite, 465 

 Christina River, 306 

 Chromium, 488, 512, 513, 541, 572 

 Chronofunctions, 42—43 

 Chrysoberyl, 489 

 Chungking, China, 292 

 Chute spillways, 184 

 Circular-arc method, 224 

 Clark Hill Dam, 183, 190 

 Classification, of ground for tunnels, 194 



of landslides, 230 



of sediments, 31, 159 



of soils, 47, 129, 186 



of tests, 99 

 Clastic carbonate, 623 

 Clastic deposits, 31, 661 

 Clastic ratio, 576 



Clay, 32, 97-101, 108, 115, 127-130, 143, 

 161, 192, 206, 219-222, 234, 240- 

 242, 441, 464-474, 490, 511, 561, 

 563, 607, 622, 640, 646, 648 



colloidal, migration of, 56, 57, 60 



initial water content, 30 



morainal, 13 



postglacial, 106 



relation of, to ceramics, 464 

 to Atterberg limits, 101 



shrinkage fissures, 107 



size of, 235 



Clay content of soils, 42, 51 

 relation of, to permeability, 607 



Clay deposits, 216 

 economic uses of, 472 



Clay formation, 55, 465 



Clay minerals, 34, 56, 85, 237, 465 

 hydration, 232 



Clay plugs, 216, 219 



Clay soil, 637 



Claypan soils, 45, 56 



Cleaning irrigation canals, 371 



Clear Fork formation, 627 



Clear Ridge Cut, 133 



Cleavage (foundry practice), 476 



Cleveland Hills, England, 518 



Climate, 14-17, 48, 413, 513 

 effect of, on environment, 17 

 on landslides, 237 



Climatic fluctuations, 251, 418, 424 



Climatic functions, 43 



Climatology, 76 



Climofunctions, 43, 48 



Climosequences, 48 



Clinton hematite, 507, 516 



Clostridium, 53 



Coal, 15, 31, 121, 131, 165, 486, 491, 561, 

 565 

 use of, in models, 302 



Coal measures, 203 



Coal mines, effect of, on highway struc- 

 ture, 138, 166 



Coalinga, Calif., 48 



Coarse-grained insoluble sedimentary 

 rocks, 160 



Coarse-grained sediments in deep water, 

 19 



Coarse-grained soils, 219 



Coast, 662 



Coastal plains, 27 



Coatings on aggregate, 447, 461 



Cobalt, Ont., 528 



Cobalt in the soil, 542, 543 



Cobbles, 131, 211, 640, 657 



Coefficient, of friction of shale, 162 

 of permeability, 115 

 of transmissibility, 115 

 of uniformity, 10 



Coeur d'Alene, Idaho, 528, 529 



Cohansey formation, 481, 482 



Cohesion, 98-103, 109, 148-154, 195, 235, 

 239, 477, 643 



