Here is a rule whereby it is not proper to administer a medicine containing scammony in case of bad hot complexion of the stomach, liver, gall, or kidneys. Dosage: its minimum dose one scruple, and its maximum dose two scruples. Note particularly, Galen says that the best species of it is the species which comes from Antioch and which has a color that tends towards being light. It is the one which is the easiest to break, the one which when broken has a color like glass. Note particularly, whether by itself or with another medicine, that it is proper to administer it in the dose we have spoken of.