Clam Chowder with butter

2 large russet potatoes , peeled and cut into ½ inch pieces (or 1 1/2 lbs.) 1/2 cup butter 3 celery ribs , chopped 1 medium onion , chopped 2 teaspoons minced[...]

2 tablespoons butter 3/4 cup chopped onion 1/4-1/2 cup diced celery 1 cup hot water 1 cup diced raw potato 20 ounces chopped canned clams , WITH the juice 2[...]