His investigations must embrace not only the comparative morphology and anatomy of fossil plants, but also their distribution over the earth's surface at different periods - a part of the subject which, besides its direct biological interest, has obvious bearings on ancient climatology and geography.
Henry, Climatology of the United States, U.S. Weather Bureau Bull.
Kunz; Report of the Secretary of Agriculture in Relation to the Forests, Rivers and Mountains of the Southern Appalachian Region (Washington, 1902); Climatology of North Carolina (Raleigh, 1892); and H.
Henry, Climatology of the United States, pp. 442-453 (Washington, 1906), being Bulletin Q of the Weather Bureau of the United States Department of Agriculture; Mineral Resources of the United States, annual reports published by the United States Geological Survey (Washington, 1883 sqq.); Charles Evans and C. O.