Enquire within upon everything by Robert Kemp Philp

583. To Prevent Pitting after Small Pox.

Spread a sheet of thin leather with the ointment of ammoniacum with mercury, and cut out a place for the mouth, eyes, and nostrils. This forms what is called a mask, and, after anointing the eyelids with a little blue ointment, it should be applied to the face, and allowed to remain for three days for the distinct kind, and four days for the running variety. _Apply before_ the spots fill with matter, although it will answer sometimes even after they have become pustulous. It may be applied to any part in the same way.