Dollond, John y George


Dollond, John y George
(10 jun. 1706, Londres, Inglaterra–30 nov. 1761, Londres) (25 ene. 1774, Londres–13 may. 1852, Londres).

Científicos ópticos británicos. John desarrolló un telescopio refractor acromático (que no distorsiona el color) y un heliómetro práctico (un telescopio que mide el diámetro del Sol y los ángulos entre cuerpos celestes). Su nieto George trabajó la mayor parte de su vida en la empresa familiar de fabricación de instrumentos, inventando diversos aparatos de precisión usados en astronomía, geodesia y navegación. Su micrómetro, hecho de cristal de roca, fue usado por astrónomos; su registrador atmosférico medía y registraba simultáneamente en una cinta de papel la temperatura, presión atmosférica, velocidad y dirección del viento, la evaporación y algunos fenómenos eléctricos.

Enciclopedia Universal. 2012.

Mira otros diccionarios:

  • Dollond, John and George — born June 10, 1706, London, Eng. died Nov. 30, 1761, London born Jan. 25, 1774, London died May 13, 1852, London British optical scientists. John developed an achromatic (non colour distorting) refracting telescope and a practical heliometer (a… …   Universalium

  • Dollond , John — (1706–1761) British optician Dollond was born in London, the son of Huguenot refugees. He started life as a silk weaver but later joined his eldest son, Peter, in making optical instruments, and devoted years of experiment to developing an… …   Scientists

  • George — George, David Lloyd George, Henry George, Pierre George, Stefan * * * (as used in expressions) Aberdeen, George Hamilton Gordon, 4 conde de George William Russell Akerlof, George A. Alexander, Harold (Rupert Leofric George) Alexander, 1 conde… …   Enciclopedia Universal

  • George — /jawrj/, n. 1. a figure of St. George killing the dragon, esp. one forming part of the insignia of the Order of the Garter. 2. Brit. Slang. any coin bearing the image of St. George. 3. a word formerly used in communications to represent the… …   Universalium

  • john — /jon/, n. Slang. 1. a toilet or bathroom. 2. (sometimes cap.) a fellow; guy. 3. (sometimes cap.) a prostitute s customer. [generic use of the proper name] * * * I known as John Lackland born Dec. 24, 1167, Oxford, Eng. died Oct. 18/19, 1216,… …   Universalium

  • John — /jon/, n. 1. the apostle John, believed to be the author of the fourth Gospel, three Epistles, and the book of Revelation. 2. See John the Baptist. 3. (John Lackland) 1167? 1216, king of England 1199 1216; signer of the Magna Carta 1215 (son of… …   Universalium

  • John — (as used in expressions) Abbot, Sir John (Joseph Caldwell) Acton (de Aldenham), John Emerich Edward Dahlberg Acton, 1 barón Adams, John Adams, John (Coolidge) Adams, John Quincy Alden, John Altgeld, John Peter André, John Arden, John Ashbery,… …   Enciclopedia Universal

  • John Dollond — Born 21 June 1706(1706 06 21) …   Wikipedia

  • Dollond — Dollond, John, Optiker, geb. 10. Juni 1706 in Spitalfields, gest. 30. Nov. 1761 m London, war bis 1752 Seidenweber, beschäftigte sich aber nebenbei mit Mathematik, Optik und Astronomie. Er verband sich mit seinem ältesten Sohn, Peter (geb. 24.… …   Meyers Großes Konversations-Lexikon

  • John Dollond — Pour les articles homonymes, voir Dollond. John Dollond …   Wikipédia en Français


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