Oil of Rhubarb.
Take Oil of sweet Almonds and Rhubarb powder'd, each as much as you please; put it into a glased Pot, lain upon lain, give it a warm Digestion for a Nights space, and then press out a golden colour'd Oil, strongly in a Press, as you would do Oil of Almonds.
As I have Heard, its frequently in use at Heidelbourgh, for the Colic, Dysentery and Worms. They give it to a child half an ounce. Indeed I never used it; but because its an odd Medicine, and has something singular in it, I would not omit it.
Thomas Fuller
Pharmacopeia Extemporanea 1710