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Laski, John

(Encyclopedia)Laski, John yän lăsˈkē [key], Latin Johannes Alasco, 1499–1560, Polish Protestant reformer. A learned priest, he went in 1523 to Basel, where he was a close friend of Erasmus. After returning to...

Fechner, Gustav Theodor

(Encyclopedia)Fechner, Gustav Theodor go͝osˈtäf tāˈōdōr fĕkhˈnər [key], 1801–87, German philosopher and physicist, founder of psychophysics, educated at Dresden and Leipzig. He became professor of physi...

Prado, Mariano Ignacio

(Encyclopedia)Prado, Mariano Ignacio märyäˈnō ēgnäˈsyō präˈᵺō [key], 1826–1901, president of Peru (1865–67, 1878–79). He aided Ramón Castilla in the revolution of 1854. Indignant at the treaty t...

prism

(Encyclopedia)prism, in optics, a piece of translucent glass or crystal used to form a spectrum of light separated according to colors. Its cross section is usually triangular. The light becomes separated because d...

Flor, Roger de

(Encyclopedia)Flor, Roger de, d. c.1306, German commander of Spanish mercenaries, b. Italy. He entered the order of the Knights Templars and fought (1291) at Acre (see Akko, but he was obliged to leave the order wh...

Duchesne, Saint Rose Philippine

(Encyclopedia)Duchesne, Saint Rose Philippine düshĕnˈ [key], 1769–1852, French educator in the United States, a Roman Catholic nun, b. Grenoble, France. She entered the order of the Visitation, but was forced...

whale

(Encyclopedia)whale, aquatic mammal of the order Cetacea, found in all oceans of the world. Members of this order vary greatly in size and include the largest animals that have ever lived. Cetaceans never leave the...

Sandwich, John Montagu, 4th earl of

(Encyclopedia)Sandwich, John Montagu, 4th earl of, 1718–92, British politician. He served variously as secretary of state (1763–65, 1770–71) and first lord of the admiralty (1748–51, 1763, 1771–82). He ea...

bellows

(Encyclopedia)bellows, expansible, gas-tight chamber used to pump or store a gas. One of the simplest and most familiar types of bellows is the manual one used for providing a forced draft to a fire. The expansible...

Sibiu

(Encyclopedia)Sibiu sēbyo͝oˈ [key], Ger. Hermannstadt, Hung. Nagyszeben, city (1990 pop. 188,385), central Romania, at the foot of the Transylvanian Alps. There are mechanical engineering works and industries pr...