Henry, Climatology of the United States, U.S. Weather Bureau Bull.
- Publications of the Maryland Geological Survey (Baltimore, 1897); Maryland Weather Service Climatology and Physical Features, biennial reports (Baltimore,1892-); United States Census; Reports of the U.S. Fish Commissioner and Bureau of Fisheries (Washington, 1871); State Department, Maryland Manual, a Compendium of Legal, Historical and Statistical Information (Baltimore, 1900-); B.C. Steiner, Citizenship and Suf f rage in Maryland (Baltimore, 1895), an historical review of the subject; J.
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.
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.
The Lima Geographical Society (founded in 1888) is perhaps the best and most active scientific organization in the republic. Its special work covers national geographical exploration and study, archaeology, statistics and climatology, and its quarterly bulletins contain invaluable information.