Columbia Encyclopedia

(Encyclopedia) Collingwood, town, S Ont., Canada at the south end of Georgian Bay, an arm of Lake Huron. Collingwood is a shipbuilding center and has one of the larges...

(Encyclopedia) screw, simple machine consisting essentially of a solid cylinder, usually of metal, around which an inclined plane winds spirally, either clockwise or counterclockwise. It is used to fasten one object...

(Encyclopedia) copper sulfate, common name for the blue crystalline heptahydrate of cupric sulfate, in which copper has valence +2. It may also refer to cuprous sulfate (Cu2SO4), in which copper has valence +1. ...

(Encyclopedia) quasar kwāˈsär [key], one of a class of blue celestial objects having the appearance of stars when viewed through a telescope and currently believed to be the most distant and most luminous objects...

(Encyclopedia)  CE5 Mansard roof mansard roof mănˈsärd [key], type of roof, so named because it was frequently used by the French architect François Mansart. It was not devised by him but was used early in th...

(Encyclopedia) Means, Russell, 1939–2012, Native American activist, b. Pine Ridge Indian Reservation, S.Dak. An Oglala Sioux, he grew up near San Francisco, and attended four colleges but never graduated. He joine...

(Encyclopedia) Carmel, Mount kärˈməl [key] [Heb.,=garden land], mountain ridge, NW Israel, extending 13 mi (21 km) NW from the plain of Esdraelon to the Mediterranean Sea, where it ends in a promontory marking th...

(Encyclopedia) Hardee, William Joseph, 1815–73, American army officer, Confederate general, b. Camden co., Ga. A graduate of West Point, he served with distinction in the Mexican War and compiled Rifle and Light I...

(Encyclopedia) Rickover, Hyman George, 1900–1986, American admiral, b. Russia. In World War II he served as head of the electrical section of the navy's Bureau of Ships. After the war he was assigned (1946) to the...

(Encyclopedia) Peters, Samuel, 1735–1826, American clergyman and historian, b. Hebron, Conn. Because of his Loyalist sympathies, he fled to England in 1774. There he wrote for English periodicals and published A G...