In his letters and books, Maxwell described the agent opening the door between the chambers as a "finite being". [[William Thomson, 1st Baron Kelvin|William Thomson (Lord Kelvin)]] was the first to use the word "demon" for Maxwell's concept, in the journal ''[[Nature (journal)|Nature]]'' in 1874, and implied that he intended the mediating, rather than malevolent, connotation of the word. | In his letters and books, Maxwell described the agent opening the door between the chambers as a "finite being". [[William Thomson, 1st Baron Kelvin|William Thomson (Lord Kelvin)]] was the first to use the word "demon" for Maxwell's concept, in the journal ''[[Nature (journal)|Nature]]'' in 1874, and implied that he intended the mediating, rather than malevolent, connotation of the word. |