Cheever, 294 Grand Coulee Dam, 247 Cowley, Malcolm, 251 Hoover Dam, 239, 247 Cowling, Donald, 251 Daugherty, Harry M., 204 Cox, Garfield V., 313 Davies, George R., 333 Coyle, David Cushman, 292, 294 Davis, Jerome, 251 Credit Davis, John W., 175, 273 contraction and expansion of, Davison, Henry, 1...