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Davis, W. M., 309, 326.
Day, D. T., 113, 288, 294, 296, 298,
300, 306, 307, 313, 318, 329.
Day, William C., 300, 313, 318, 323,
326.
Dejarnette, D. C., 277.
Dekay, J. E., 240.
De Laet, 389.
De La Polerie, 342.
Delisle, Guillaume, 342, 343, 360.
Desor, E., 264.
De Verneuil, Ed., 262.
De Verrazano, 332.
Devonian, 182.
De Witt, F., 333.
Dexter, 242.
Diabase, 168, 171.
Diatoniaceous earth, 36, 222.
Dieffenbach, Otto, 266, 268.
Dilworth, W. H., 374.
D'lnvilliers, E. V., 288.
Diorite, 166.
Disbrow, Levi, 56, 241.
Donn, J. W., 118, 119, 123.
Dorsey, Clarence W., 329.
Doucker, H., 335.
Douglas, D. B., 65, 253, 368.
Douglas, H. T., 398.
Douglas, James, 309.
Ducatel, J. T., 58, 60, 61, 62, 63, 64,
71, 116, 247, 249, 250, 251, 253,
254, 255, 256, 258, 366, 367, 368.
Duncan, P. Martin, 298.
Dunlap, Thos., 278.
Dunlop, J., 2-10, 273.
Dunn, Samuel, 352.
Dunnington, F. P., 309.
Durand, Elias, 244, 245.
Dutton, C. E., 303.
E.
Echard, Lawrence, 345.
Ehrenberg, C. G., 67, 256, 258, 267.
Eldredge, N. T., 251.
Elkgarden formation, 187.
Emmons, Ebenezer, 265.
Emmons, S. F., 103, 307, 318, 323.
Eocene, 195.
Erickson, Captain, 254.
Establishment of the Survey, 23.
Evans, Lewis, 234, 347, 349, 352, 357,
360.
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F.
Faber, Wm. L., 264.
Faden, Wm., 353, 355, 356.
Fairfax formation, 187.
Farrer, Virginia, 335, 389.
Faul, Aug., 374.
Featherstonhaugh, G. W., 250.
Ferguson, J., 123.
Final reports, preparation of, 41.
Finch, J., 55, 239, 245.
First Geological Survey, 57.
Fisher, R. S., 264.
Fisher, Will, 339.
Flaherty, W. T., 393.
Folie, A. P., 357.
Fontaine, Wm. M., 103, 105, 109, 110,
279, 280, 282, 288, 303, 329.
Foote, A. E., 314.
Forbes, Edw., 260.
Fordyce, W., 269.
Foster, J. W., 379.
Frazer, Persifor, Jr., 82, 280, 281,
283, 284, 285, 290, 296.
Frederick County map, 387.
Frostburg formation, 188.
Fry, Joshua, 346, 347, 351, 352.
Or.
Gabb, Wm., 269.
Gabbro, 164, 213.
Gabbro-diorite, 165.
Gaines, R. H., 103.
Gane, H. S., 91, 326.
Gannett, Henry, 290, 294, 303, 310,
318, 323, 326, 390.
Garretson, Frederick, 286.
Garrett, J. W., 275.
Garvin, 346.
Gaussoin, Eug., 271.
Geiger, F. W., 103.
Geiger, H. R., 103, 310, 393.
Geikie, Archibald, 318.
Genth, F. A., 268, 271, 279.
Geological maps, preparation of, 31.
Gerdes, F. H., 116.
Gibbes, George, 277.
Gibbes, R. W., 262.
Gibson, T., 349.
Gilbert, G. K, 300, 329.
Gill, A. C., 87, 303.
Gillmore, Q. A., 279.
Gilmor, Robert, Jr., 53, 237.
Glenn, Wm., 318.
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