a substance originally obtained from hart's horn (deer antlers). Depending on the process it could be used for:
1) smelling salts
2) medicinally to treat diarrhea, insect bites, snakebites, and some other ailments
3) a leavening agent in baking (as baking powder is today)
► uses
Uses:
When Augustine, pale as death, was found lying on the sofa, and pleaded sudden sick-headache as the cause of his distress, she recommended to him to smell of hartshorn;