1725 - 1779
Patrick d'Arcy Irish Physicist
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Patrick d'Arcy is a member of the following lists: People from County Galway, French Army personnel and Deaths from cholera.
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Details
| First Name |
Patrick
|
| Last Name |
D'Arcy
|
| Birthday |
30th November, 1724
|
| Birthplace |
Kiltullagh, Co. Galway, Ireland
|
| Died |
18th October, 1779
|
| Place of Death |
Paris (France)
|
| Nationality |
Irish
|
| Occupation |
Physicist
|
Patrick d'Arcy (27 September 1725 – 18 October 1779) was an Irish mathematician born in Kiltullagh, County Galway 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.
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