Judkins' Ointment

Linseed-oil 1 pt; sweet oil 1 oz; and boil them in a kettle on coals for nearly 4 hours, as warm as you can; then have pulverized and mixed, borax 1/2 oz; red lead 4 ozs, and sugar of lead 1 1/2 ozs; remove the kettle from the fire and thicken in the powder; continue the stirrying until cooled to blood heat, then stir in 1 oz of spirits of turpentine; and now take out a little, letting it get cold, and if not then sufficiently thick to spread upon thin, soft linen as a salve, you will boil again until this point is reached.

[...] it is good for all kinds of wounds, bruises, sores, burns, white swellings, rheumatisms, ulcers, sore breasts, and even where there are wounds on the inside, it has been used with advantage, by applying a plaster over the part.

Source: Dr Chase's Recipes, or Information for Everybody, A.W. Chase

Salve for Burns, Frost-Bites, Cracked Nipples &c.

Equal parts of turpentine, sweet oil and beeswax; melt the oil and wax together, and when a little cool, add the turpentine, and stir until cold, which keeps them evenly mixed.

Apply by spreading upon thin cloth -- linen is the best.

Source: Dr Chase's Recipes, or Information for Everybody, A.W. Chase

Techniques: Infusion

Infusion is one of the most frequent operations required in making up medicines, its object being to extract the aromatic and volatile principles of substances, that would be lost by decoction or digestion; and to extract the soluble from the insoluble parts of bodies. Infusions such as calumba and quassia may be made with cold water, in which case they are weaker, but more pleasant. The general method employed consists in slicing, bruising or rasping the ingredients first, then placing them in a common jug (which should be as globular as possible), and pouring boiling water over them. Cover the jug with a cloth folded six or eight times, but if there be a lid to the jug so much the better. When the infusion has stood the time directed, hold a piece of very coarse linen over the spout, and pour the liquid through it into another jug.

Source: Enquire Within Upon Everything.