Book 23 begins with the sentence: “Oleum cicinum bibitur ad purgationes
ventris cum pari calidæ mensura.” The whole passage is of interest. The following is the translation of it given in Bohn’s “Classical Library” (Dr. Bostock): “Castor oil taken with an equal quantity of warm water acts as a purgative upon the bowels. It is said, too, that as a purgative it acts particularly upon ...