Geology Writings, ca. 1891-1900, undated

“Lake Baikal,” August 23, 1900, 22 p. “The Latest Discoveries of the Traces of Glacial Man at Trenton, New Jersey,” 1899, 8 p. Presented August 23, 1899 at Ohio State University before the Anthropological section of the American Association for the Advancement of Science. Revised for the Scientific American Supplement. “The Lava Beds of Idaho,” 1891, 23 p. see Scientific American S19 “The Lava Beds of Idaho and California and their Relationship to the Antiquity of Man,” undated, 16 p.