Beat the eggs slightly. Add milk and salt; mix well. Pour butter into baking pans (16 1/2 x 10 1/2 x 2 1/2 inches). Use 1/2 cup per pan. Add the egg mixture (about 2 quarts per pan). Bake at 350 degrees for about 40 minutes, stirring once after 20 minutes of baking.
Variations:
Eggs and Cheese; reduce quantity of eggs to 40 and add 1 pound (1 quart) grated cheese.
Eggs and Dried Beef: Reduce quantity of eggs to 40 and add 12 ounces dried beef (chopped)
Eggs and Ham: Reduce quantity of eggs to 40 and add 3 cups chopped cooked ham.