The longer dry beans are stored, the longer they may take to cook. First, sort and rinse the beans. For each cup of beans, bring 3 cups of water to boil, add the beans to the boiling water, and boil for two minutes. Next, add 3/8 teaspoon of baking soda (sodium bicarbonate) for each cup of beans, cover, and soak for 1 hour or more. More baking soda may be required for older beans. Next, drain and rinse the beans thoroughly, cover with water, bring to boil, then reduce heat and simmer 1-2 hours or until tender. Do not add salt or other ingredients until the beans have softened adequately. See
All Is Safely Gathered In: Family Home Storage Basic Recipes for additional information.