Under Pope Paul IV it was felt that the religious convictions of an author contaminated all his writings, and as Gessner was a Protestant, it was added to the Catholic Church's list of prohibited books.
Baixo o papado do Paulo IV considerábase que as convicións relixiosas dun autor contaminaban todos os seus escritos, e como Gessner era protestante, o libro foi engadido pola Igrexa católica ao Índice de libros prohibidos.