Long Livers: A Curious History of Such Persons of Both Sexes Who Have Liv’d Several Ages, and Grown Young Again 

The practice of alchemy included ways and means of extending life and keeping one’s youthful appearance as long as possible.  Arnaldus de Villanova was a 13th century physician believed to have been an alchemist and astrologer.  This 18th century volume reproduces his recipe (probably apocryphal)  for rejuvenating one’s youth.