Limnology zoologist) and Einar Naumann (a Swedish botanist) co-founded the International Society of Limnology (SIL, from Societas Internationalis Limnologiae). Forel's original definition of limnology, "the oceanography of lakes", was expanded to encompass the study of all inland waters, and influenced Benedykt Dybowski's work on Lake Baikal. Prominent early American limnologists included G. Evelyn Hutchinson, Ed Deevey, E. A. Birge, and C. Juday. Physical properties of aquatic ecosystems are determined by a combination of heat, currents, waves and other seasonal distributions of environmental conditions. The morphometry of a body of water depends on the type of feature (such as a lake, river,
The Study of the Negro Problems The Study of the Negro Problems The Study of the Negro Problems, from "The Annals of the American Academy of Political and Social Science" (January 1898), is an essay written by professor, sociologist, historian and activist W. E. B. Du Bois. It both challenges the question he poses in his "The Souls of Black Folk" (1903) of “How does it feel to be a problem?” and is reminiscent of the popular mindset of whites toward people of color at the time. As a reoccurring theme amid Du Bois’ works, the Negro as a problem to those representing the majority population