(Encyclopedia) Bragg, Sir William Lawrence, 1890–1971, English physicist, b. Adelaide, Australia, educated in Australia and at Trinity College, Cambridge; son of W. H. Bragg. He was professor of…
(Madame C. J. Walker)businesswoman, philanthropistBorn: 12/23/1867Birthplace: Delta, La. After a series of bereavements that left her orphaned at 6 and widowed at 20, she and her daughter A'Lelia…
actressBorn: 12/22/1922 Birthplace: Los Angeles, CADied: 10/16/2010 (Santa Monica, CA) Barbara Billingsley was born Barbara Lillian Combes on Dec. 22, 1915, in…
(Encyclopedia) horn, in zoology, one of a pair of structures projecting from the head of a hoofed animal, used chiefly as a weapon. In cattle, sheep, Old World antelopes, and related animals the…
(Encyclopedia) Hodgkin, Dorothy Mary Crowfoot, 1910–94, English chemist and X-ray crystallographer, b. Egypt. She received the 1964 Nobel Prize in chemistry for determining the structure of…
(Encyclopedia)
CE5
Image formation by curved mirrors and lenses
reflection, return of a wave from a surface that it strikes into the medium through which it has traveled. The general principles…
(Encyclopedia) Bragg, Sir William Henry, 1862–1942, English physicist, educated at King William's College, Isle of Man, and Trinity College, Cambridge. He served on the faculties of the Univ. of…
(Encyclopedia) Nicol prismNicol prismnĭkˈəl [key], optical device invented (1828) by William Nicol of Edinburgh. It consists essentially of a crystal of calcite, or Iceland spar, that is cut at an…
(Encyclopedia) Orbiting Solar Observatory (OSO), series of eight orbiting observatories (see observatory, orbiting) launched between 1962 and 1971 by the National Aeronautics and Space Administration…
Are you often stumped by the name of a little thing? Do you call common objects whatchamacallits? Help is on the way! There are names for those little things in life.Belt: tongue, punch holes,…
