A.

Abbe, Cleveland, Jr., 18.
Abert, J. J., 372, 381.
Acid volcanics, 174.

Adams, F. D., 322.
Adams, W. H., 289.
Aikin, W. E. A., 64, 246.

Alexander, J. H., 58, 60, 61, 62, 63,
64, 116, 247, 248, 249, 250, 251,
252, 255, 256, 366, 367, 368.

Alger, Francis, 259.

Algonkian, 161, 169, 174.

Alsop, George, 232, 336.

American Association for the Ad-
vancement of Science, grant
by, 405.

Anderson and Gilpin, 361.

Andree, Richard, 388.

Andriveau, Goujon E., 377.
Angese, Baptista, 332.

Anon., 231, 232, 233, 234, 239, 241,

242, 243, 244, 245, 246, 248, 250,
252, 254, 255, 258, 260, 263, 264,
265, 266, 269, 272, 274, 275, 277,
278, 279, 280, 281, 282, 286, 287,
289, 293, 296, 299, 303, 305, 308,
316, 322, 325, 328, 332, 338, 340,
342, 343, 345, 348, 349, 350, 351,
352, 354, 355, 356, 358, 359, 361,
365, 366, 370, 372, 375, 376, 387,
388, 391, 392, 395, 397, 398.

Ansted, D. T., 268.

Antietam formation, 178.
Antimony, 227.

Appalachian region, 103, 150, 158,

172.

Archean, 161.

Armstrong, S. C., 293.

Arundel formation, 190.
Asbestos, 227.

Ashburner, Chas. A., 287, 296, 298,

299, 306.

Asher and Adams, 380.

Aydelott, W. J., 276, 290.

Allyon, Lucas Vasquez, 332.

B.

Babb, Cyrus C., 113, 313, 316.

Bache, A. D., 248, 251, 271, 376, 377,

378.

Bache, C. M., 118.

Bagg, R. M., 18, 109.

Bailey, Francis, 356.

Bailey, J. Trowbridge, 287.

Bailey, J. W., 67, 258, 259, 262, 263,

267.

Baird, G. W., 401.

Bakewell, Tho., 345.
Baldwin, R., 347.

Bannon, Benj., 273, 378.
Barney, C. R., 364.
Barney, J., 364.
Bartholomew, J., 392.
Baschke, A., 375.

Bascom, Florence, 90, 316.
Basic volcanics, 169, 175.
Bauer, L. A., 19, 403.
Bayard formation, 186.
Beers, D. G., 379.

Benton, Edward R., 296, 391.
Bernard, S., 239, 240, 241, 364.
Berthier, P., 245.

Bibbins, A., 18, 91, 110, 325.
Bibliography, 231.

Bill, provisions of, 23.
Binneman, W., 338.

Birkinbine, J., 298, 315, 316, 317, 322,
325.

Blake, W. P., 379, 380, 381, 382, 383.
Blakiston, Wm. T., 246.

Blandy, J. F., 282.

Bleau, Johannem and Wilhelm, 47,

232, 334.

Blodget, L., 277, 380.

Blome, Richard, 233, 234, 337.

Blunt, Edward, 123, 375.

Blunt, G. W., 375.

Bodfish, S. H., 98, 114, 300.

Bond, Isaac, 373.

Booth, J. C., 65, 66, 250, 254, 255.
Boutelle, C. O., 123.

Clark, W. B., 5, 7, 21, 43, 86, 87, 88,
89, 90, 91, 106, 107, 109, 111, 300,
303, 306, 309, 313, 316, 317, 321,
322, 325, 328, 329, 393, 399, 405,
432.

Clarke, F. W., 102, 290, 294, 296, 303,

306, 309, 313, 317.

Clarke, J. M., 300.

Clays, 34, 214.

Cleaveland, Parker, 55, 237, 238.

Clemson, Thos. G., 247.

Clerk, F. L., 288.

Coals, 35, 219.

Coastal plain, 104, 143, 145, 157, 188.
Cole, Wm. R., 272.

Colom, Jacob, 336.
Colton, 388.

Columbia formation, 199.

Columbus, Christopher, 407, 408.
Commission, meeting of, 25.
Commission, resolutions passed by,
25.

Conrad, T. A., 56, 65, 66, 80, 243, 244,
247, 248, 249, 253, 254, 255, 256,
257, 259, 261, 265, 270, 271, 272,
273.

Cook, George H., 288.
Cook, R. S., 296.

Cope, E. D., 80, 273, 274.
Copper, 51, 226.

Cornelius, Elias, 54, 238.
Coronelli, Vincenzo, 338.
Couder, Thos., 354.

County resources, study of, 37.

Courtenay, E. H., 248, 251.

Credner, H., 80, 275, 379.
Cresap, Thos., 346.
Cretaceous, 191.

Crexius, Pere du, 336.
Crystalline limestone, 170.

D.

Daddow, S. H., 273, 378.
Dall, W. H., 112, 306, 313, 393.
Dalrymple, J., 347.

Dana, E. S., 313.
Dana, J. D., 284, 325.
Daniel, R., 233, 338.

D'Anville, 345, 347, 348, 350, 351, 355.
Darton, N. H., 101, 104, 106, 107, 108,

109, 112, 115, 309, 317, 322, 329,
393, 395, 396, 397, 398, 400.

Daubeny, Chas,, 253.

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.

Diatomaceous earth, 36, 222.

Dieffenbach, Otto, 266, 268.
Dilworth, W. H., 374.
D'Invilliers, 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., 240, 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.

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.

G.

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.

534

Gluck, J. B., 117.
Gneiss, 162, 207.
Godon, Silvain, 53, 236.
Gold deposits, 36, 221.
Goode, G. Brown, 297.
Goos, Peter, 336.
Gosnal, Barth, 341.

Graham, J. D., 263, 369.
Granite, 167, 175, 207.
Granitite, 167.

Grant, U. S., 318.

Graphite, 228.

Gray, F. A., 380, 382, 383.
Green, Duff, 250.

Green, W., Jr., 377.
Greenbrier formation, 185.

Griffith, Dennis, 358, 359, 362.
Grimsley, G. P., 90, 323, 398.
Griswold, W. T., 98, 114.
Guittard, Jean Etienne, 346.
Gunpowder River map, 387.

Harden, J. W., 80, 276.

Harlan, R., 247, 249, 256, 257.

Harper, General, 239.

Harpers formation, 177.

Harris, G. D., 112, 313, 318, 323, 396.
Harris, John, 339.

Hassler, F. R., 60, 62, 116.

Hatcher, J. B., 111.

Hayden, H. H., 53, 54, 64, 236, 238,
244, 246, 365, 401.

Haxton, Walter, 343, 344.

Heilprin, A., 81, 82, 285, 286, 290,

291, 389.

INDEX

Hilgard, Eugene W., 314.
Hilgard, J. E., 84.
Hill, R. T., 319, 329.
Hilliard, 355.

Hinton, James, 364.

Hitchcock, C. H., 276, 277, 287, 298,
379, 380, 381, 382, 383, 388, 389,
391.

Hitchcock, E., 267, 371, 372.

Hobbs, W. H., 86, 87, 300, 304, 307.
Hodge, Jas. T., 275.

Hoen, A. B., 20.

Holland, N., 357, 359.

Holmes, W. H., 307, 319.

Homann, Joh. Bapt., 340, 343, 349.
Homin, 332.

Hondij, Henrici, 334.

Hondius, Iodocus, 332.

Hopkins, G. M., 383, 385, 386, 387.

Hotchkiss, J., 390.

Howard, W., 240.

Howell, D. J., 98, 114.

Howell, Reading, 362.

Hughes, George W., 250.

Hughes, Jer., 260.

Humphreys, H., 251.

Hunt, T. Sterry, 276, 280, 281, 283,

288.