90. Reconnaissance of North-western Wyoming, including the Y. N. P., made in the summer of 1873. Captain W. A. Jones, of the Corps of Engineers, with sub-reports by Prof. Theo. B. Comstock, Dr. C. L. Heizman, U. S. A., and Dr. C. C. Parry. Washington: Government Printing Office. 1875. 91. Reconnaissance of the Streams and Lakes of Western Montana and North-western Wyoming. Barton W. Evermann. In Report of the United States Commissioner of Fish and Fisheries. Washington: Government Printing Office. 1892, pp. 1-58. 92. Reconnaissance of the Streams and Lakes of the Yellowstone National Park, Wyoming, in the interests of the United States Fish Commission. David Starr Jordan. Bulletin United States Fish Commission, vol. ix, pp. 41-63. Washington: Government Printing Office. 1890. 93. Reconnaissance for a Wagon Road to the National Park. Gov. John W. Hoyt, of Wyoming. In Annual Report of Secretary of the Interior, 1881. Vol. ii, p. 1074. Washington: Government Printing Office. 1881. 94. Reconnaissance of the Yellowstone River in 1871. Captains Barlow and Heap, of the United States Corps of Engineers. Sen. Ex. Doc. No. 66, 42d Cong., 2d Sess. 95. Report upon United States Geographical Surveys West of the One Hundredth Meridian. Captain George M. Wheeler, Corps of Engineers, U. S. A. Washington: Government Printing Office. 1889. Vol. i contains a memoir upon the Voyages, Explorations, and Surveys pertaining to that portion of the United States west of the Mississippi River from the year 1500 to 1880, including an epitome of a Memoir by Lieutenant G. K. Warren, covering the period from 1800 to 1857. 96. Resources of Montana Territory and Attractions of the Y. N. P. R. E. Strahorn. Helena, Montana: Montana Legislative Assembly. 1879. Richardson, James, 131. Riley, W. C., 56. 97. River of the West, The. Frances Fuller Victor. Hartford, Conn.: Columbian Book Company. 1871. Pages 75 and 76 contain a description of some of the hot springs districts of the Park as seen in 1829. 98. Roads in the Y. N. P. Lieutenant H. M. Chittenden, U. S. A. _Good Roads_, vol. v, no. 1, p. 1. Roberts, E., 3, 146. 99. Rocky Mountain Region of Wyoming and Idaho. James Eccles. _Alpine Journal_, London. Vol. ix, p. 241. Rollins, A. W., 111. Roosevelt, Theodore, 2, 30, 61. Rutgers, L., 17. Rutley, F., 70. Saltus, J. S., 123. Sanitarium, A Winter, 124. Sargent, C. S., 149. 100. Scorodite from the Y. N. P. J. Edward Whitfield. Bulletin U. S. G. S., No. 55. Washington: Government Printing Office. 1889. Sears, C. B., 6. Secretaries of the Interior, Annual Reports of, 7, 80, 93. Sessions, F. C., 147. Sheridan, M. V., 66. Sheridan, P. H., 32, 34, 64, 66. Sherman, W. T., 64. Shields, G. O., 18. 101. Siliceous Pebbles from the Geyser of the Yellowstone Cañon. A. P. Townsend. _American Chemist_, vol. iii, p. 288. Siliceous Sinter, Formation of, 12. 102. Soaping Geysers. Arnold Hague. _Science_, vol. xiii, p. 382. Also in Smithsonian Report for 1892, p. 153.