Roger Bacon (1214 – 1292) was British philosopher and scholar with remarkably wide scope of scientific knowledge and interests. His major works are Opus Majus, Opus Minus, Compendium Studii Philosophiae and more contain treatments of mathematics, alchemy, and the celestial bodies.. He was one of the first European implementers of the modern scientific method greek and arabic scholars."Tract on the Tincture and oil of Antimony" is an essay by Roger Bacon. It is and alchemic manual that cover Antimony, different forms of states of this substance, the ways it can used and obtained. And also it is an insight in scientific methodology of thirteens century. If alchemy and medieval science is of any interest for you, than this short tract is a must read, along with other Bacon’s works and publications.