—Archaean Characters of the Rocks of the Nucleal Ranges of the Antilles. 1 p.—Brit. Assn., 1888.
—Notes on Fresh-Water Wells of the Atlantic Beach. 4 pp.—Journ. Franklin Inst., Sept., 1890.
—The Position of the American New Red Sandstone. 8 pp.—Trans. Am. Inst. Min. Engin., Vol. V.
—On the Traps of the Mesozoic Sandstone in York and Adams Counties, Penn. 13 pp., 4 pl.—Am. Phil. Soc'y, April 16, 1875.
—The Whopper Lode, Gunnison County, Colo. 10 pp.—Am. Inst. Min. Engin., Aug., 1880.
—Some Copper Deposits of Carroll County, Md. 8 pp., 1 pl.—Am. Inst. Min. Engin., Aug., 1880.
—A Convenient Device to be Applied to the Hand Compass. 1 p.—Am. Phil. Soc'y, Dec. 5, 1884.
—The Approaches to a Theory of the Causes of Magnetic Declination. 16 pp.—Am. Phil. Soc'y, Apr. 6, 1877.
—On Improvement in the Construction of the Hypsometric Aneroid.—Am. Phil. Soc'y, March 2, 1883.
—An Exfoliation of Rocks near Gettysburg. 2 pp.—Am. Phil. Soc'y, Dec. 4, 1874.