Potato Soup

4 cups peeled and diced potatoes, 1/2 cup minced onion, 2 cups chicken stock or one 13 3/4 oz can chicken broth, 1 tsp salt, 1/2 tsp celery salt, 1/8 tsp. pepper and 2 cups milk.

Put all ingredients except milk in sauce pan and simmer until potatoes are done.  Add milk.  Soup may be thickened with a flour and milk mixture.