Adams, Professor F. D., McGill University, Canada, 241.
Alden, Dr. W. C., Washington, D.C., 353.
American Museum of Natural History, New York, 344.
Ash, H. C., Galesburg, Ill., 133.
Beyer, Dr. S. W., Iowa College of Agriculture, 363.
Calvin, Dr. Samuel, Iowa State University, 45, 295, 317, 325, 371.
Carney, Frank, Ithaca, N.Y., 356.
Clark, Dr. Wm. B., Maryland Geological Survey, 43.
Borne, Dr. Georg v. d., Jena, Germany, 5, 6.
Daly, Dr. R. A., Ottawa, Canada, 164.
Defieux, C. A., Liverpool, England, 154.
* Detroit Photographic Co., 235, 236.
* Ellis, W. M., Edna, Kan., 13.
Fairchild, Professor H. L., University of Rochester, 141, 357.
Field Columbian Museum, Chicago, 87.
Forster, Dr. A. E., University of Vienna, 32.
Gardner, J. L., Boston, 12, 140, 352.
Geological Survey of Canada, 256.
Gilbert, Dr. G. K., by courtesy of the American Book Company, 39.
* Haines, Ben, New Albany, Ind., 33.
* Haynes, F. J., St. Paul, Minn., 52, 95, 233.
Henderson, Judge Julius, Boulder, Col., 94.
James, George Wharton, Pasadena, Cal., 16, 127, 215, 229.
Johnston-Lavis, Professor H. J., Beaulieu, France, 216.
King, J. Harding, Stourbridge, England, 119.
Lawson, Dr. Andrew C., University of California, 113.
Le Conte, Professor J. N., University of California, 8.
Libbey, Dr. William, Princeton University, 92.
* McAllister, T. H., New York, 242.
* Meyers, H. C., Boise, Id., 19.
Mills, Professor H. A., Cornell College, 208, 304.
Norton, Professor W. H., Cornell College, 14, 35, 59, 88, 128,
183, 226, 234, 255, 340, 364, 367.
* Notman, Wm. & Son, Montreal, Canada, 98, 181.
Obrutschew, Dr. W., Tomsk Technological Institute, Siberia, 73.
Oldham, Dr. R. D., Geological Survey of India, 120.
* Peabody, H. C., Pasadena, Cal., 54.
* Pierce, C. C. & Co., Los Angeles, Cal., 15.
Pillsbury, Arthur, San Francisco, Cal., .115.
* Rau, Wm., Philadelphia, 18, 21, 122, 123, 218.
Reusch, Dr. Hans, Geological Survey of Norway, 112.
Reynolds, Professor S. H., University College, Bristol, England, 202.
Ricker, Principal Maurice, Burlington, Iowa, 48, 89.
* Shepard, E. A., Minneapolis, Minn., 105.
Smith, W. S. Tangier, Los Gatos, Cal., 186.
* Soule Photographic Co., Boston, 131.
U. S. Geological Survey, 3, 4, 23, 25, 34, 41, 63, 69, 78, 79,
80, 110, 111, 114, 125, 126, 129, 130, 142, 151, 153, 169,
172,177, 178, 188, 211, 212, 214, 228, 237, 238, 239, 243, 244,
254, 257, 340, 341, 353, 355.
U. S. National Museum, 149, 220, 221, 222, 225, 332.
* Valentine & Sons, Dundee, Scotland, 40, 136, 227.
Vroman, A. C., Pasadena, Cal., 17.
* Ward's Natural Science Establishment, Rochester, N.Y., 152.
* Welch, R., Belfast, Ireland, 1, 37.
* Westgate, Dr. L. G., Ohio Wesleyan University, 66.
Whymper, Edward, London, England, 106.
* Wilcox, W. D., Washington, D.C., 20.
* Wilson, Dr. A. W.
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