58 To Cure Butter
Take two parts of the best common salt, one part of sugar and one of saltpetre, blend the whole well together. Mix one ounce of this composition well with every sixteen ounces of the butter. Close it up tight in kegs, cover it with an oiled paper, and let it remain untouched for a month. Butter cured in this manner is very nice, and will keep good eight or nine months, if not exposed to the air.