Barlow, Peter W., 221, 227
Beach, Alfred Ely, 224, 227-229, 231, 237
Brunel, Marc Isambard (the elder), 204, 205, 217, 218, 221,
224, 229, 231, 236
Burleigh, Charles, 212, 213
Burleigh Rock Drill Company, 212
Burr, S. D. V., 236
Cochrane, Sir Thomas, 231, 232
Copperthwaite, William Charles, 224
Doane, Thomas, 210, 212, 213, 215
Drinker, Henry S., 224, 237
Greathead, James Henry, 204, 218, 221, 224, 229, 231, 235-237
Gwynn, Stuart, 210
Haskin, DeWitt C., 204, 232, 234-236
Haupt, Herman, 204, 209, 210
Hobson, Joseph, 237
Latrobe, Benjamin H., 208, 209
Law, Henry, 218