- Barus, Carl, 1891, The viscosity of solids: Govt. Print. Off., Bulletin 73, xii, 139 p. :vi fold. pl., diagrs. ;24 cm.,
- Clark, William Bullock, 1891, Correlation papers: Eocene: Govt. Print. Off., Bulletin 83, 173 p. :ii fold maps ;24 cm.,
- Clarke, Frank Wigglesworth, 1891, Report of work done in the division of chemistry and physics, mainly during the fiscal year 1889-90: Bulletin 78, 131 p.,
- Darton, Nelson Horatio, 1891, Record of North American geology for 1887 to 1889, inclusive: Govt. Print. Off., Bulletin 75, 173 p. ;23 cm.,
- Darton, Nelson Horatio, 1891, Record of North American geology for 1890: U.S. G.P.O., Bulletin 91, 88 p. ;24 cm.,
- Diller, Joseph Silas, 1891, A late volcanic eruption in northern California and its peculiar lava: Govt. Print. Off., Bulletin 79, 33 p. :ill., xvii pl. (incl. fold. front.) diagrs. ;24 cm.,
- Gannett, Henry, 1891, A dictionary of altitudes in the United States (second edition): Govt. print. off., Bulletin 76, 393 p. ;24 cm.,
- Genth, F. A., 1891, The minerals of North Carolina: Govt. Print. Off., Bulletin 74, 119 p. ;24 cm.,
- Lesquereux, Leo; a posthumous work, edited by Knowlton, Frank Hall, 1891, The flora of the Dakota group: Govt. print. off., Monograph 17, 400 p.,
- Powell, J. W., 1891, Eleventh Annual report of the Director of the United States Geological Survey, Part 1: 1889-1890: Annual Report 11, xv, 757 p.; 66 pl.,
- Powell, J. W., 1891, Eleventh Annual report of the Director of the United States Geological Survey, Part 2: 1889-1890: Annual Report 11, 390 p.; 30 ill.; 4 figs.,
- Powell, J. W., 1891, Twelfth Annual report of the Director of the United States Geological Survey, 1890-1891: Part 1: U.S. Geological Survey Annual Report 12, 675 pages, 6 plates (in pocket); Extract (Eruptive Rocks) available at http://www.nps.gov/history/history/online_books/geology/publications/rpt/12-1/,
- Powell, J. W., 1891, Twelfth Annual report of the Director of the United States Geological Survey, 1890-1891: Part 2 - Irrigation: Annual Report 12, p. 213-362,
- Scudder, Samuel Hubbard, 1891, Index to the known fossil insects of the world, including myriapods and arachnids: [U.S.] Govt. Print. Off., Bulletin 71, 2 v. (744 p.) ;28 cm.,
- Upham, Warren, 1891, Altitudes between Lake Superior and the Rocky Mountains: Govt. Print. Off., Bulletin 72, 229 p. ;24 cm.,
- Walcott, Charles D., 1891, Correlation papers: Cambrian: Govt. Print. Off., Bulletin 81, 447 p. :iii fold. maps, diagrs. ;24 cm.,
- White, Charles A., 1891, The Texan Permian and its Mesozoic types of fossils: Govt. Print. Off., Bulletin 77, 51 p. :iv pl., diagr. ;24 cm.,
- White, Charles A., 1891, Correlation papers: Cretaceous: Govt. Print. Off., Bulletin 82, 273 p. :iii fold. pl. (incl. maps) diagrs. ;24 cm.,
- White, I. C., 1891, Stratigraphy of the Bituminous Coal Field of Pennsylvania, Ohio and West Virginia: Geological Survey (U.S.) Bulletin 65, 212 p. :ill. ;24 cm.,
- Williams, Henry Shaler, 1891, Correlation papers: Devonian and Carboniferous: Govt. Print. Off., Bulletin 80, 279 p. ;24 cm.,
