1774-79: Gave chemistry course in his officine.
1777: With Hecquet d'Orval, owner of the Manufacture Royale de moquettes, won 2nd prize in the Academie des Sciences Indigo competition.
(1770s): made eau-forte for 6 years and sold it to local dyers and jewellers. Also operated a nitriere artificielle.
1782: Analyse de l'eau minerale de Forges.
1784: sold house and left for Paris, where he is said to have become director of a large manufacture-- perhaps a saltpetre refinery.
1786: Elemens de Chimie Docimastique.
fl 1786: probably teaching chemistry in Paris.
fl Feb1789: Manager of the alum works at Monchy-Humieres.
31/3/89: witnessed the birth of his grandson, living on rue de la Harpe, Paris
By Dec 1790 and fl Mar 1791: associate in a chlorine bleaching works at Petit-Gentilly, Paris, to which has been added the manufacture of several 'preparations chimiques.'
fl Jan 1792: Running a chlorine bleaching works at Chantilly [Obs Phys]. Might be a mistake for Petit-Gentilly.
1793-94: director of an alum works at Lacroix-St-Ouen, Oise.
1794: revolutionary saltpetre programme (Paris, probably).
1795-death: director of the alum and copperas works at St Georges de Lavencas, Aveyron.
8/9/97: reported to have established a successful alum works with Nicolas Le Blanc--a mistake for JJM Le Blanc.
1796 Jan 26: candidate for correspondant, chemistry section, First Class of the Institut. Address given as St Affrique, Aveyron. As was Le Blanc, with the same address.