Charles Étienne Louis Camus
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Charles Étienne Louis Camus, was a French mathematician and mechanician who was born at Crécy-en-Brie, near Meaux in the province of Île-de-France.
Camus, Cours de mathématique (1753).
Meridian arc
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In geodesy and navigation, a meridian arc is the curve between two points near the Earth's surface having the same longitude. The term may refer either to a segment of the meridian, or to its length.
Charles Étienne Louis Camus
…to that body. In 1736 he accompanied Pierre Louis Maupertuis and Alexis Clairaut in the expedition to Lapland for the measurement of a degree of meridian arc. He was the author of a Cours de mathématiques (Paris, 1766), and a number of essays on mathematical and mechanical subjects. In 1760 he became perpetual…
The north and south sections of the meridinal survey met at Rodez Cathedral, seen here dominating the Rodez skyline at left.
A copy of the "provisional" metre located in the wall of a building, 15 rue de Vaugirard, Paris. These metres were provisional (French: provisoire) because the expedition and the calculations to determine the definitive length of metre were not completed until 1799.
Montjuïc Castle in Barcelona, Spain – the southern end of the meridian arc