103. Soaping Geysers. _Popular Science Monthly_, vol. xxxvii, p. 139. 104. Soaping Geysers. R. W. Raymond. Transactions of the American Institute of Mining Engineers, Buffalo Meeting, October, 1888. Stanley, E. J., 88. 105. Statistics of Mines and Mining. Rossiter W. Raymond. Washington: Government Printing Office. 1870. Page 312 contains references to the geysers of the Yellowstone. 106. Statistics of Mines and Mining. Rossiter W. Raymond. Washington: Government Printing Office. 1872. Pages 213-216 contain a reference to the geysers from the pen of General Washburn. Strahorn, R. E., 31, 96. Strong, W. E., 116. 107. Summer's Outing, A, or, The Old Man's Story. Carter Harrison. Chicago: Dibble Publishing Company. 1891. Superintendents of the Y. N. P., Annual Reports of, 8. Tetons, The Three, 111. Thatcher, M., 37. 108. Therapeutical Value of the Springs in the Y. N. P. Dr. C. L. Heizmann, U. S. A. Philadelphia. _Medical Times_, vol. vi, p. 409. 109. Thermal Springs of the Y. N. P., Report on. A. C. Peale. _Popular Science Monthly_, vol. xxiii, p. 515. 110. Thirty-seven Days of Peril. Truman C. Everts. _Scribner's Monthly_, vol. iii, p. 1. 111. Three Tetons, The. Alice Wellington Rollins. _Harper's_, vol. lxxiv, p. 869. 112. Through the Yellowstone Park to Fort Custer. Dr. S. Weir Mitchell. _Lippincott's_, vol. xxvi, p. 29. 113. Through the Yellowstone Park on Horseback. G. W. Wingate. New York: Orange Judd. Co. 1886. Tillman, S. E., 41. Topping, E. S., 25. Townsend, A. P., 101. 114. Transactions Montana Historical Society, vol. i. Helena, Montana: Rocky Mountain Publishing Company. 1876. Contains numerous references to the Upper Yellowstone, the most important of which is an article entitled "Trip up the South Snake River," by Walter W. De Lacy. 115. Travels in the Interior of America in the years 1808-10-11. John Bradbury. Liverpool: 1817. Travertine, Formation of, 12. Trip up the South Snake River in 1863. Walter W. De Lacy, 114. 116. Trip to the Y. N. P., in July, August and September, 1875. Gen. W. E. Strong. Washington. 1876. Trumbull, Walter, 121, 137. 117. Two-Ocean Pass, The So-called. Dr. F. V. Hayden. Vol. v, Bulletins United States Geological Survey of the Territories, p. 223. Two-Ocean Pass, 30, 91, 117. 118. Unexplained Phenomena of the Geyser Basins of the Y. N. P. Theodore B. Comstock. _Popular Science Monthly_, vol. xii, p. 372. Union Pacific Railroad Company, 56. United States Geological Survey, Annual Reports of, 9 to 12. 119. Valley of the Upper Yellowstone. David E. Folsom. _Western Monthly_, vol. iv, p. 60, July, 1870. Reprinted by Mr. N. P. Langford, with an interesting preface by himself. St. Paul, Minn. 1894. Vegetation of Hot Waters, 12. Victor, F. F., 97. 120. Vigilante Days and Ways. N. P. Langford. St. Paul: D. D. Merrill & Co. 1893. Contains numerous references to the Park. Walton, G. E., 75. Warren, G. K., 95. Washburn, H. D., 106, 137.