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Clarke, Samuel

(Encyclopedia)Clarke, Samuel, 1675–1729, English philosopher and divine. His chief interest was rational theology, and, although a critic of the deists, he was in sympathy with some of their ideas. He supported t...

Boscovich, Ruggiero Giuseppe

(Encyclopedia)Boscovich, Ruggiero Giuseppe ro͞od-jāˈrō jo͞ozĕpˈpā bôsˈkōvēch [key], 1711–87, Italian mathematician, astronomer, and physicist. He became a Jesuit and taught at Rome, Pavia, and Milan. ...

Beltsville swine

(Encyclopedia)Beltsville swine, two breeds of swine developed at the agricultural research center of the U.S. Department of Agriculture in Beltsville, Md. The breeds are designated Beltsville No. 1 and Beltsville N...

Silchester

(Encyclopedia)Silchester sĭlˈchĭstər [key], village, Hampshire, S England. It is noted for the ruins of the Roman-British town Calleva Atrebatum. The outside walls (2,760 yd/2,524 m in circumference), forum, am...

gravitation

(Encyclopedia)gravitation, the attractive force existing between any two particles of matter. The term gravitygravity is commonly used synonymously with gravitation, but in correct usage a definite distinction is...

Hamilton, James, 3d earl of Arran

(Encyclopedia)Hamilton, James, 3d earl of Arran, 1530–1609, Scottish nobleman; son of James Hamilton, 2d earl of Arran. He spent some years (1550–58) as a soldier in France, but his espousal of Protestantism br...

atomism

(Encyclopedia)atomism, philosophic concept of the nature of the universe, holding that the universe is composed of invisible, indestructible material particles. The theory was first advanced in the 5th cent. b.c. b...

Halley, Edmond

(Encyclopedia)Halley, Edmond hălˈē, hôˈlē [key], 1656–1742, English astronomer and mathematician. He is particularly noted as the first astronomer to predict the return of a comet and the first to point out...

centripetal force and centrifugal force

(Encyclopedia)CE5 Centripetal and centrifugal forces: When a ball is swung in a circle at the end of a string, centripetal and centrifugal forces act as shown above. centripetal force and centrifugal force, act...

Atholl

(Encyclopedia)Atholl ăthˈəl [key], successively an earldom, a marquisate, and a dukedom of Scotland. For Scottish nobles so entitled, use Stuart, John, and Murray, John. ...