Stir well to mix and then let ferment in a warm place for ten hours. Now pour into jar or crock and store in a cool place.
TO USE
Use one and one-half cups of this mixture in place of the yeast cake. Always stir well before using and take care that the mixture does not freeze. This potato ferment must be made fresh every eighteen days in winter and every twelve days in summer.
STRAIGHT DOUGH VIENNA
One quart of water or milk,
One ounce of salt,
One ounce of sugar.
Stir well to thoroughly dissolve, and then add
Two yeast cakes,