Take of Spanish flies 1 oz., gum euphorbium 3 drachms, tartar emetic 1
oz., rosin 3 oz.; mix and pulverize, and then mix them with a half lb. of
lard. Anoint every three days for three weeks; grease the parts affected
with lard every four days. Wash with soap and water before using the
salve. In poll-evil, if open, pulverize black bottle glass, put as much in
each ear as will lay on a dime. The above is recommended in outside
callous, such as spavin, ringbone, curbs, windgalls, etc. etc.