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van der Waals, Johannes Diderik

(Encyclopedia)van der Waals, Johannes Diderik yōhäˈnəs dēˈdərĭk vän dər väls [key], 1837–1923, Dutch physicist. It had been known for some time that the behavior of real gases differs from that of an i...

Pratt, Charles, 1st Earl Camden

(Encyclopedia)Pratt, Charles, 1st Earl Camden, 1714–94, British jurist. Appointed (1761) chief justice of the Court of Common Pleas, he earned wide popularity as a result of his ruling in Entick v. Carrington (17...

Sandage, Allan Rex

(Encyclopedia)Sandage, Allan Rex, 1926–2010, American astronomer, b. Iowa City, Iowa, Ph.D. California Institute of Technology, 1953. He was a graduate student under Walter Baade and an assistant to Edwin Hubble....

petal

(Encyclopedia)petal, one of the four basic parts of a flower, next innermost organ from the sepal. The whorl of petals is known collectively as the corolla [Lat.,=little crown]. The number of petals is usually cons...

friction

(Encyclopedia)friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not...

Helvetic Republic

(Encyclopedia)Helvetic Republic hĕlvēˈtĭk [key], 1798–1803, Swiss state established under French auspices. In Sept., 1797, several exiled Swiss leaders in France (notably Frédéric César de La Harpe) formal...

John of the Cross, Saint

(Encyclopedia)John of the Cross, Saint, Span. Juan de la Cruz, 1542–91, Spanish mystic and poet, Doctor of the Church. His name was originally Juan de Yepes. He was a founder of the Discalced Carmelites and a clo...

Mammoth Cave National Park

(Encyclopedia)Mammoth Cave National Park, 52,830 acres (21,396 hectares), central Kentucky, authorized 1926, est. 1941. Located in a hilly, forested region, it offers numerous outdoor activities. It is the site of ...

Menominee, indigenous people of North America

(Encyclopedia)Menominee mənŏmˈənē [key], indigenous people of North America whose language belongs to the Algonquian branch of the Algonquian-Wakashan linguistic stock (see Native American languages). Also cal...

Lively, Dame Penelope

(Encyclopedia)Lively, Dame Penelope, 1933–, English novelist, b. Cairo, Egypt, moved to London at 12 when her parents divorced, grad. Oxford (1954). Her earliest books were children's novels—the first Astercote...