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Jean Althen (Hovhannès Althounian; 1709–1774) was an Iranian-Armenian agronomist who developed the cultivation of madder in France. Although the plant had been present in the region before his arrival, it was Althen who developed its cultivation, turning it into an industry. In 1754, he arrived in Avignon where he started experimenting with the cultivation of madder. Associated with a local landlord, Clauseau Aïné, he produced a crop of 2500 kg (5500 lbs) in 1769. Poor business decisions led to financial problems, and he died in poverty in 1774. A French commune, Althen-des-Paluds, is named after him, as well as statues and streets in several cities of the south of France. ==Bibliography== * * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Jean Althen」の詳細全文を読む スポンサード リンク
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