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Pestalozzi, Johann Heinrich
(Encyclopedia)Pestalozzi, Johann Heinrich yōˈhän hīnˈrĭkh pĕsˌtälôtˈsē [key], 1746–1827, Swiss educational reformer, b. Zürich. His theories laid the foundation of modern elementary education. He stu...Erie Canal
(Encyclopedia)Erie Canal, artificial waterway, c.360 mi (580 km) long; connecting New York City with the Great Lakes via the Hudson River. Locks were built to overcome the 571-ft (174-m) difference between the leve...Koch
(Encyclopedia)Koch kōk [key], family of American industrialists and philanthropists. Fred Chase Koch, 1900–1967, b. Quanah, Tex., grad. Massachusetts Institute of Technology, 1922, was a Wichita, Kans., entrepre...eugenics
(Encyclopedia)eugenics yo͞ojĕnˈĭks [key], study of human genetics and of methods to improve the inherited characteristics, physical and mental, of the human race. Efforts to improve the human race through bette...aggression
(Encyclopedia)aggression, a form of behavior characterized by physical or verbal attack. It may appear either appropriate and self-protective, even constructive, as in healthy self-assertiveness, or inappropriate a...Ur
(Encyclopedia)Ur ûr [key], ancient city of Sumer, S Mesopotamia. The city is also known as Ur of the Chaldees. It was an important center of Sumerian culture (see Sumer) and is identified in the Bible as the home ...Spector, Phil
(Encyclopedia) Spector, Phil (Harvey Philip), 1939-2021, American record producer, b. Bronx, NY. The child of Russian Jewish immigrants, Spector’s father passed awa...depression, in economics
(Encyclopedia)depression, in economics, period of economic crisis in commerce, finance, and industry, characterized by falling prices, restriction of credit, low output and investment, numerous bankruptcies, and a ...rock music
(Encyclopedia)rock music, type of music originating in the United States in the mid-1950s and increasingly popular throughout much of the world. A turning point in rock music occurred in the mid-1970s in the ...Harding, Warren Gamaliel
(Encyclopedia)Harding, Warren Gamaliel gəmāˈlēəl [key], 1865–1923, 29th President of the United States (1921–23), b. Blooming Grove (now Corsica), Ohio. After study (1879–82) at Ohio Central College, he ...Browse by Subject
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