—Descriptive Table of Elements. 2 pp.—1891.
—The late International Geological Congress at Berlin. 4 pp.—Am. Phil. Soc'y, Nov. 20, 1885.
—Report of the American Committee of the International Congress of Geologists. 5 pp.—Proc. A. A. A. S., Vol. XXXV, August, 1886.
—General Notes on the Geology of York County, Penn. 20 pp.—Colored maps.
—On the Physical and Chemical Characteristics of a Trap occurring at Williamson's Point, Penn. 8 pp., 1 colored plate. Read before Am. Phil. Soc'y, Dec. 20, 1878.
—An Hypothesis of the Structure of the Copper Belt of the South Mountain. 4 pp., Ill.—Trans. Am. Inst. Min. Engin., June, 1883. Read at the Roanoke, Va., Meeting.
—A Broader Field for the U. S. Geological Survey. 4 pp.—Journ. Franklin Instit., Sept., 1888.
—The Peach Bottom Slates of the Lower Susquehanna, with sections of the Right and Left Banks. 5 pp., 3 pl.—Am. Inst. Min. Eng., Oct., 1883.
—Reply to a paper entitled "Notes on the Geology of Chester Valley and Vicinity." 8 pp.—Journ. Franklin Inst., April, 1884.
—Mr. Theodore D. Rand's Criticism of Vol. C4 Geology of Chester County, Penn. 6 pp.—Journ. Franklin Inst., Oct., 1883.