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Sino-Tibetan languages

(Encyclopedia) Sino-Tibetan languages, family of languages spoken by over a billion people in central and SE Asia. This linguistic family is second only to the Indo-European stock in the number of…

nucleus, in physics

(Encyclopedia) nucleus, in physics, the extremely dense central core of an atom. Following the discovery of radioactivity by A. H. Becquerel in 1896, Ernest Rutherford identified two types of…

Serengeti National Park

(Encyclopedia) Serengeti National Park, c.5,700 sq mi (14,800 sq km), NE Tanzania, est. 1941. The internationally famous park attracts large numbers of tourists to see the world's largest…

blood count

(Encyclopedia) blood count, method for determining the number of red (erythrocytes) and white (leukocytes) blood cells in a certain volume of blood. This test can be used as a preliminary step in…

Tomlin, Bradley Walker

(Encyclopedia) Tomlin, Bradley Walker, 1899–1953, American painter, b. Syracuse, N.Y., grad. Syracuse Univ. (1921). He also studied painting in London and Paris. His early work includes cover designs…

concentration

(Encyclopedia) concentration, in chemistry, measure of the relative proportions of two or more quantities in a mixture. The concentration of a solute is very important in studying chemical reactions…