Mesmer got more and more patients, but he also attracted attacks from other doctors, and these eventually caused his departure for distant Paris. There he likewise established a large practice before the French government formed an investigatory committee to examine his theories. The committee found no evidence to support the contention that people were magnetic and judged that his theories and methods were unscientific.
梅斯默的病人愈來愈多，不過也引來其他醫師攻訐，使得他遠走巴黎，結果同樣大受歡迎，法國政府組成調查委員會檢驗他的理論，但是委員們找不到人有「磁性」的根據，便宣判他的理論與方法是不科學的。