[1] When his father died in 1745 Monsieur de Saint-Laurent, former General Treasurer of colonies, took responsibility for the family, making sure the children were well-educated.
He was friends with Benjamin Franklin, inventor, publisher, American Founding father and the United States Minister to France from 1778 to 1785.
In 1778, with his friend and Agricultural Society member Antione Parmentier, he obtained the King's permission to found a newspaper, the Journal de Paris.
He declared, "I have six brothers to all of us, we lose 60,000 livres from the recent political events, we are no less patriotic and for the return of our property, we would not see the rebirth of the old order of things.
"[citation needed] In 1780 the police chief Jean-Charles-Pierre Lenoir made Cadet de Vaux the "salubrity inspector" of Paris.
Cadet de Vaux used muriatic acids, combustion of smoke, efficient ventilation and other innovative methods to disinfect insanitary workshops and public places.
[3] Father Claude Cadet was born in 1695 at Regnault (currently Renault Dawn Fresnoy), near Troyes, the son of a poor farmer.