In giving the recipe for his dope, Nessmuk says that it produces a glaze
over the skin and that in preventing insect bites he has never known it
to fail. This is the dope:
Pine tar 3 oz.
Castor oil 2 oz.
Oil of pennyroyal 1 oz.
Simmer all together over a slow fire, and bottle.
This is sufficient for four persons for two weeks.