Jean-Charles de Borda

BordaJean Charles de Bordade Borda, Jean-CharlesJean Charles BordaJean-Charles, chevalier de Borda
Jean-Charles, chevalier de Borda (4 May 1733 – 19 February 1799) was a French mathematician, physicist, and sailor.wikipedia
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Borda count

BordaBorda methodDowdall system
In 1770, Borda formulated a ranked preferential voting system that is referred to as the Borda count.
The Borda count was developed independently several times, as early as 1435 by Nicholas of Cusa, but is named for the 18th-century French mathematician and naval engineer Jean-Charles de Borda, who devised the system in 1770.

Dax, Landes

DaxArènes de DaxDax (Landes)
Borda was born in the city of Dax to Jean‐Antoine de Borda and Jeanne‐Marie Thérèse de Lacroix.

Jacques-Noël Sané

Sané
He was appointed as France's Inspector of Naval Shipbuilding in 1784, and with the assistance of the naval architect Jacques-Noël Sané in 1786 introduced a massive construction programme to revitalise the French navy based on the standard designs of Sané.

Action of 6 December 1782

6 December 1782captured by the Englishdetails
In 1782, he was captured by the English, and was returned to France shortly after.
The 64-gun, captained by John Collins, sailed towards the 1,521-ton of 64 guns, under the command of Jean-Charles de Borda.

Étienne Lenoir (instrument maker)

Etienne LenoirÉtienne Lenoir
As an instrument maker, he improved the reflecting circle (invented by Tobias Mayer) and the repeating circle (invented by his assistant, Etienne Lenoir), the latter used to measure the meridian arc from Dunkirk to Barcelona by Delambre and Méchain.
When hired by Jean-Charles de Borda around 1772 to work on the reflecting circle, he was about thirty years old and nearly illiterate.

Repeating circle

As an instrument maker, he improved the reflecting circle (invented by Tobias Mayer) and the repeating circle (invented by his assistant, Etienne Lenoir), the latter used to measure the meridian arc from Dunkirk to Barcelona by Delambre and Méchain.
Developed from the reflecting circle, the repeating circle is an instrument for geodetic surveying, invented by Etienne Lenoir in 1784, while an assistant of Jean-Charles de Borda, who later improved the instrument.

French ship Borda

BordaFrench ship ''BordaFrench ships were named ''Borda
Six ships of the French Navy have borne the name Borda in honour of Jean-Charles de Borda.

Kangaroo Island

KangarooKangaroo Island ParksKangaroo Island, South Australia
Baudin named the Island Île Borda, in honour of Jean-Charles de Borda, although the French chart published by Louis de Freycinet after Baudin's death referred to the Island as Île Decres.

Cape Borda

It was named after Jean-Charles de Borda (1733–1799), the French mathematician, physicist, naturalist and sailor, by the Baudin expedition to Australia during January 1803.

Reflecting instrument

reflecting circledouble-reflecting sectordoubly reflecting navigation instrument
As an instrument maker, he improved the reflecting circle (invented by Tobias Mayer) and the repeating circle (invented by his assistant, Etienne Lenoir), the latter used to measure the meridian arc from Dunkirk to Barcelona by Delambre and Méchain.
Jean-Charles de Borda further developed the reflecting circle.

Borda–Carnot equation

Borda-Carnot equation
*Borda–Carnot equation
The equation is named after Jean-Charles de Borda (1733–1799) and Lazare Carnot (1753–1823).

Gradian

gradgongrads
The Republican Calendar was abolished by Napoleon in 1806, but the 400-degree circle lived on as the Gradian.

Borda (crater)

Borda
It was named after French astronomer Jean-Charles de Borda.

List of the 72 names on the Eiffel Tower

72 names inscribed on the Eiffel Towerthe 72 names on the Eiffel Tower72 people whose names are inscribed on the Eiffel Tower

France

FrenchFRAFrench Republic
Jean-Charles, chevalier de Borda (4 May 1733 – 19 February 1799) was a French mathematician, physicist, and sailor.

Mathematician

mathematiciansapplied mathematicianMathematics
Jean-Charles, chevalier de Borda (4 May 1733 – 19 February 1799) was a French mathematician, physicist, and sailor.

Physicist

physicistsresearch physicistengineer and physicist
Jean-Charles, chevalier de Borda (4 May 1733 – 19 February 1799) was a French mathematician, physicist, and sailor.

Sailor

marinersailorsseaman
Jean-Charles, chevalier de Borda (4 May 1733 – 19 February 1799) was a French mathematician, physicist, and sailor.

Military engineering

military engineerengineerengineers
In 1756, Borda wrote Mémoire sur le mouvement des projectiles, a product of his work as a military engineer.

French Academy of Sciences

Académie des SciencesAcadémie Royale des SciencesAcademy of Sciences
For that, he was elected to the French Academy of Sciences in 1764. The French Academy of Sciences used Borda's method to elect its members for about two decades until it was quashed by Napoleon Bonaparte who insisted that his own method be used after he became president of the Académie in 1801.

Caribbean

the CaribbeanWest IndiesWest Indian
Borda was a mariner and a scientist, spending time in the Caribbean testing out advances in chronometers.

American Revolutionary War

Revolutionary WarAmerican War of IndependenceAmerican Revolution
Between 1777 and 1778, he participated in the American Revolutionary War.

French Navy

Marine NationaleFrenchNavy
In 1781, he was put in charge of several vessels in the French Navy.

Electoral system

multi-membervoting systemvoting systems
In 1770, Borda formulated a ranked preferential voting system that is referred to as the Borda count.

Napoleon

Napoleon BonaparteNapoleon INapoleon I of France
The French Academy of Sciences used Borda's method to elect its members for about two decades until it was quashed by Napoleon Bonaparte who insisted that his own method be used after he became president of the Académie in 1801.