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hydrometer

(Encyclopedia)hydrometer hīdrŏmˈətər [key], device used to determine directly the specific gravity of a liquid. It usually consists of a thin glass tube closed at both ends, with one end enlarged into a bulb t...

binocular

(Encyclopedia)CE5 Binocular binocular, small optical instrument consisting of two similar telescopes mounted on a single frame so that separate images enter each of the viewer's eyes. As with a single telescope...

C.I.A.M.

(Encyclopedia)C.I.A.M. (Congrès internationaux d'architecture moderne). Founded in 1928 by Hélène de Mandrot, Sigfried Giedion, and Le Corbusier, C.I.A.M. sought to divert architecture from academic preoccupatio...

Espinel, Vicente Martínez

(Encyclopedia)Espinel, Vicente Martínez vēthānˈtā märtēˈnāth āspēnĕlˈ [key], 1550–1624, Spanish writer, musician, and adventurer. Espinel was notorious for his dissolute life, which his holy vows, ta...

Aaron

(Encyclopedia)Aaron ârˈən [key], in the Bible, the brother of Moses and his spokesman in Egypt, and the first high priest of the Hebrews. He is presented as the instrument of God in performing many signs, such a...

Oistrakh, David Feodorovich

(Encyclopedia)Oistrakh, David Feodorovich oiˈsträk [key], 1908–74, Ukrainian violinist, b. Odessa. Encouraged by his father, an amateur violinist, he began to study his instrument at the age of five. He graduat...

Marler, Peter Robert

(Encyclopedia)Marler, Peter Robert, 1928–2014, British ethologist, b. Slough, England, Ph.D University College London, 1952, and Cambridge, 1954. At Cambridge he was introduced to the sonic spectrograph, an instr...

accordion

(Encyclopedia)CE5 Accordion accordion, musical instrument consisting of a rectangular bellows expanded and contracted between the hands. Buttons or keys operated by the player open valves, allowing air to enter...

Watt, James

(Encyclopedia)Watt, James, 1736–1819, Scottish inventor. While working at the Univ. of Glasgow as an instrument maker, Watt was asked to repair a model of Thomas Newcomen's steam engine. He devised improvements t...

spirit level

(Encyclopedia)spirit level, tool for determining whether a surface is horizontal. It consists essentially of a slightly bent transparent tube that is held in a frame. The tube contains some alcohol, ether, or simil...