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,
What Work Is of a superior, and the hellish nature of the task that the narrator is performing and its effect upon him. Much of the collection contains a series of grim and brooding passages. Paul Gray, a contributor of "Time" called Levine's narrators “guerrillas, trapped in an endless battle long after the war is lost.” This may refer to instances where Levine recalls his childhood hometown of Detroit. Yet others, such as Marie Borroff, suggest that Levine's work is joyful despite its painful material. Initial reviews for "What Work Is" praised Levine for his working-class subject matter, which represented a marked change