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Magnetic surveys, historical sum-
mary of, 425.
Magnetic work, report upon, 403.
Magnetism of earth, diurnal varia-
tion of, 418.
Manganese, 227.
Marble, 164, 209.
Marcou, Jules, 265, 266, 268, 291, 330,
371, 372, 373.
Markoe, Francis, Jr., 257.
Marls, 35, 217.
Marsh, 0. C. M., 301, 304, 330.
Martenet, Simon J., 373, 374, 376,
377, 378, 380, 384, 387, 390, 391.
Martin, H. N., 84.
Martinsburg formation, 180.
Maryland Academy of Sciences, 70.
Maryland Agricultural College, 73,
92.
Maryland Agriciiltural Experiment
Station, 73.
Maryland State Weather Service, 92,
323, 330, 395, 396, 397, 398, 399,
400.
Mason and Dixon, 351, 520.
Mason and Dixon's Line, 51, 52, 141,
497.
Matawan formation, 193.
Mathews, E. B., 17, 18, 19, 91, 229.
Mauch Chunk formation, 185.
McCreath, Andrew A., 283, 291.
McDonald, A., 277.
McGee, W. J., 101, 104, 105, 106, 109,
110, 112, 115, 289, 295, 297, 298,
299, 301, 304, 310, 311, 392, 394,
396.
Mease, James, 363.
Mentelle, E., 361.
Mercator, Michael, 332, 333.
Mercer, Chas. F., 247.
Meridian lines of surveyor, estab-
lishment of, 508.
Merrick, Wm. D., 248.
Merrill, George P., 292, 304, 311, 326.
Merrill, Wm. E., 278.
Meteorological Committee's report,
252.
Meyer, Otto, 302, 304.
Mica, 228.
Michler, N., 378.
Middleton, Jefferson, 327.
Miller, S. A., 286.
Mine Inspector's Bureau, 94.
Mineral paints, 36, 222.
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Mineral resources, investigation of,
32.
Mineral waters, 37, 223.
Minoz, J. B., 357.
Miscellaneous products, 37, 225.
Mitchell, Jas. A., 91, 327.
Mitchell, John, 348.
Mitchill, Jno., 348.
Mitchill, Samuel L., 54, 237, 401.
Moll, Herman, 335, 339, 340, 341, 343,
344.
Molybdenum, 227.
Monmouth formation, 193.
Monterey formation, 182.
Morden, Robt., 338.
Morris, Wm. E., 374.
Morton, S. G., 56, 64, 65, 241, 242,
243, 245, 246, 248, 249.
Moxon, Chas., 368.
Munroe, Chas. E., 291.
Murlin, A. E., 99, 114.
N.
Neale, S. J., 360.
Neocene formation, 196.
Newark formation, 171.
Newbury, S. B., 314, 319, 323.
Newell, 'F. H., 113, 324, 327.
Nicollet, J. N., 258.
Nolan, I. B., 341.
Norman, George, 270.
Nuttall, Thomas, 238.
O.
Officers of the Survey, 27.
Ogilby, John, 337.
O'Harra, C. C., 18.
Ottens, R. J., 360.
Owen, J. S., 244.
Owen, Richard, 373.
Owen, Robert Dale, 263.
P.
Pamunkey formation, 195.
Parker, E. W., 314, 320, 324, 327.
Parrish, R. D., 273.
Patapsco formation, 191.
Patterson, Harry J., 307, 311.
Patuxent formation, 190.
Paynter, Thos., 271.
Peale, A. C., 297, 314, 320, 324, 327.
Pearce, J., 55.
Pegmatite, 168.
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