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- Patrick_d'Arcy abstract "Patrick d'Arcy (27 September 1725 – 18 October 1779) was born in the west of Ireland. His family, who were Catholics, suffered under the penal laws. In 1739 d'Arcy was sent abroad by his parents to an uncle in Paris. He was tutored in mathematics by Jean-Baptiste Clairaut, and became a friend of Jean-Baptiste's son, Alexis-Claude Clairaut, (Alexis Clairaut), who was a brilliant young mathematician. d'Arcy made original contributions to dynamics. He is best known for his part in the discovery of the principle of angular momentum, in a form which was known as "the principle of areas," which he announced in 1746. See the article on areal velocity. d'Arcy also had an illustrious military career in the French army. He obtained the title of "Count" in the French nobility. He was a generous patron of Irish refugees in France. In addition to his contributions to dynamics, he performed research on artillery and on electricity. An experiment of his, reported in 1765, on visual perception is often referred to: it involved a rotating disk on which a burning coal was placed; when the disk was spun at an angular velocity exceeding seven revolutions per second, a full circle of light was perceived. d'Arcy was elected to the Academie Royale des Sciences in 1749. He died from cholera in Paris in October 1779.There is a copy of a portrait of d'Arcy in Wade (1997), [1], which was found in Charbonnier (1928).".
- Patrick_d'Arcy birthDate "1725-09-27".
- Patrick_d'Arcy birthYear "1725".
- Patrick_d'Arcy country Ireland.
- Patrick_d'Arcy deathDate "1779-10-18".
- Patrick_d'Arcy deathYear "1779".
- Patrick_d'Arcy nationality Ireland.
- Patrick_d'Arcy viafId "24592325".
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- Patrick_d'Arcy dateOfBirth "1725-09-27".
- Patrick_d'Arcy dateOfDeath "1779-10-18".
- Patrick_d'Arcy hasPhotoCollection Patrick_d'Arcy.
- Patrick_d'Arcy name "Arcy, Patrick D".
- Patrick_d'Arcy shortDescription "Irish physicist".
- Patrick_d'Arcy description "Irish physicist".
- Patrick_d'Arcy description "Irish physicist".
- Patrick_d'Arcy subject Category:1725_births.
- Patrick_d'Arcy subject Category:1779_deaths.
- Patrick_d'Arcy subject Category:Deaths_from_cholera.
- Patrick_d'Arcy subject Category:French_Army_personnel.
- Patrick_d'Arcy subject Category:Irish_physicists.
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- Patrick_d'Arcy comment "Patrick d'Arcy (27 September 1725 – 18 October 1779) was born in the west of Ireland. His family, who were Catholics, suffered under the penal laws. In 1739 d'Arcy was sent abroad by his parents to an uncle in Paris. He was tutored in mathematics by Jean-Baptiste Clairaut, and became a friend of Jean-Baptiste's son, Alexis-Claude Clairaut, (Alexis Clairaut), who was a brilliant young mathematician. d'Arcy made original contributions to dynamics.".
- Patrick_d'Arcy label "Patrice d'Arcy (physicien)".
- Patrick_d'Arcy label "Patrick d'Arcy".
- Patrick_d'Arcy label "Д’Арси, Патрик".
- Patrick_d'Arcy sameAs Patrice_d'Arcy_(physicien).
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- Patrick_d'Arcy sameAs Patrick_d'Arcy.
- Patrick_d'Arcy wasDerivedFrom Patrick_d'Arcy?oldid=600833940.
- Patrick_d'Arcy givenName "Patrick D".
- Patrick_d'Arcy isPrimaryTopicOf Patrick_d'Arcy.
- Patrick_d'Arcy name "Arcy, Patrick D".
- Patrick_d'Arcy name "Patrick D Arcy".
- Patrick_d'Arcy surname "Arcy".
