Peel and slice potatoes Add remaining ingredients Let stand overnight in a warm place In the morning when it has foam on top remove the potatoes and discard Add 14 teaspoon of soda and thicken with flour Let rise Add 12
gallon 8 cups flour to make a sponge
Add risen mixture and let rise again Make out into 4 loaves Grease pans well Bake in moderate 350 oven for 45 minutes or more