The Secret Book of Artephius

Gather this with a spoon or feather dipping it in; and in doing so often times a day until nothing more arises; evaporate the water with a gentle heat, i.e., the superfluous humidity of the vinegre, and there will remain the quintessence, potestates or powers of gold in the form of a white oil incombustible. In this oil the philosophers have placed their greatest secrets; it is exceeding sweet, and of great virtue for easing the pains of wounds.