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Carroll, James

(Encyclopedia)Carroll, James, 1854–1907, American bacteriologist and army surgeon, b. Woolwich, England, M.D. Univ. of Maryland, 1891. He went to Canada at 15 and later joined the U.S. army. A member of the Yello...

Energy, United States Department of

(Encyclopedia)Energy, United States Department of, executive department of the federal government responsible for coordinating national activities relating to the production, regulation, marketing, and conservation...

balance

(Encyclopedia)balance, instrument used in laboratories and pharmacies to measure the mass or weight of a body. A balance functions by measuring the force of gravity that the earth exerts on an object, i.e., its wei...

market gardening

(Encyclopedia)market gardening, cultivation, on suburban land of high value, of vegetables and flowers for the supply of nearby cities. Heavy fertilizing and the planting of successive crops are employed to obtain ...

Mayflower Compact

(Encyclopedia)Mayflower Compact, in U.S. colonial history, an agreement providing for the temporary government of Plymouth Colony. The compact was signed (1620) on board the Mayflower by the adult male passengers; ...

Thomas, Martha Carey

(Encyclopedia)Thomas, Martha Carey, 1857–1935, American educator and feminist, b. Baltimore, grad. Cornell, 1877, studied at Johns Hopkins and at Leipzig, the Sorbonne, and Zürich (Ph.D., 1882). In 1884 she was ...

D'Alembert's principle

(Encyclopedia)D'Alembert's principle dălˈəmbârzˌ [key], in mechanics, principle permitting the reduction of a problem in dynamics to one in statics. This is accomplished by introducing a fictitious force equal...

Eysenck, Hans Jurgen

(Encyclopedia)Eysenck, Hans Jurgen häns yo͝orˈgən īˈsĕngk [key], 1916–97, British psychologist. Best known for his theory of human personality, Eysenck suggested that personality is biologically determined...

Hamilton, Andrew Jackson

(Encyclopedia)Hamilton, Andrew Jackson, 1815–75, American politician, b. Huntsville, Ala. Moving to Texas in 1846, he served (1849) as attorney general, was a member of the legislature (1851–53), and in 1859 wa...

Kirchhoff's laws

(Encyclopedia)Kirchhoff's laws [for Gustav R. Kirchhoff], pair of laws stating general restrictions on the current and voltage in an electric circuit. The first of these states that at any given instant the sum of ...