Baron Gaspard Clair François Marie Riche de Prony was a French mathematician and engineer, who worked on hydraulics. He was born at Chamelet, Beaujolais, France and died in Asnières-sur-Seine, France. Wikipedia
Born: July 22, 1755, Chamelet, France
Died: July 29, 1839 (age 84 years), Asnières-sur-Seine, France
Partner: Marie-Pierrette de la Poix de Fréminville (1782–) and Marie-Pierrette de la Poix de Fréminville