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Rittenhouse, David

(Encyclopedia)Rittenhouse, David, 1732–96, American astronomer and instrument maker, b. near Germantown, Pa., self-educated. A clockmaker by trade, he developed great skill in the making of mathematical instrumen...

Vologda

(Encyclopedia)Vologda vôˈləgdə [key], city (1989 pop. 283,000), capital of Vologda region, N central European Russia, on the Vologda River. It is a major river and rail junction in a dairying region. There are ...

Termez

(Encyclopedia)Termez tyĭrmyĕsˈ [key], city (1991 pop. 99,000), capital of Surkhandaryo region, S Uzbekistan, a port on the Amu Darya River, near the Afghanistan border. It is the center of an agricultural region...

navigation satellite

(Encyclopedia)navigation satellite, artificial satellite designed expressly to aid the navigation of sea and air traffic. Early navigation satellites, from the Transit series launched in 1960 to the U.S. navy's Nav...

Insull, Samuel

(Encyclopedia)Insull, Samuel ĭnˈsəl [key], 1859–1938, American public utilities financier, b. London. He arrived in the United States in 1881 and was employed by Thomas A. Edison as a private secretary. He lat...

Djibouti, city, Republic of Djibouti

(Encyclopedia)Djibouti jēbo͞otēˈ [key], town (1995 est. pop. 383,000), capital of the Republic of Djibouti, a port on the Gulf of Tadjoura (an inlet of the Gulf of Aden). It is the nation's only sizable town an...

streetcar

(Encyclopedia)streetcar, small, self-propelled railroad car, similar to the type used in rapid-transit systems, that operates on tracks running through city streets and is used to carry passengers. Most often cars ...

Sugihara, Chiune

(Encyclopedia)Sugihara, Chiune, 1900–1986, Japanese diplomat who saved several thousand European Jews during World War II. He served (1920–22) in the army, then joined the Japanese foreign ministry. In 1939 he ...

weight

(Encyclopedia)weight, measure of the force of gravity on a body (see gravitation). Since the weights of different bodies at the same location are proportional to their masses, weight is often used as a measure of m...

gram

(Encyclopedia)gram, abbr. g, unit of mass equal to 0.001 kilogram, the basic unit of mass in the metric system. The gram is the unit of mass in the cgs system. It is approximately equal to 0.035 avoirdupois ounce, ...