He had a theory that there was a natural transfer of energy between all animated and inanimate objects. He called this animal magnetism, sometimes later referred to as "mesmerism". The theory attracted a wide following between about 1780 and 1850, and continued to have some influence until the end of the century. In 1843 the Scottish physician James Braid proposed the term hypnosis for 'animal magnetism'. Today this is the usual term for mesmerism.