Allow three-fourths of a pound of sugar to the gallon, the whites of six eggs, well beaten, a handful of common salt. Leave it open until fermentation ceases, then bung up. This process a dealer of cider has used for years, and always successfully.
To keep cider sweet allow it to work until it has reached the state most desirable to the taste, and then add one and a half tumblers of grated horse-radish to each barrel, and shake up well. This arrests further fermentation. After remaining a few weeks, rack off and bung up closely in clean casks.
A gentleman of Denver writes he has a sure preservative: Put eight gallons of cider at a time into a clean barrel; take one ounce of powdered charcoal and one ounce of powdered sulphur; mix and put it into some iron vessel that will go down through the bung-hole of the barrel. Now put a piece of red-hot iron into the charcoal and sulphur, and while it is burning, lower it through the bung-hole to within one foot of the cider, and suspend it there by a piece of wire. Bring it up and in twelve hours you can cure another batch. Put the cider in a tight barrel and keep in a cool cellar and it will keep for years.
To one quart of new milk, fresh from the cow (not strained), add one half pound of ground black mustard seed and six eggs. Beat the whole well together and pour into a barrel of cider. It will keep cider sweet for one year or more.