415. To keep Iron and Steel Goods from Rust.--Dissolve half an ounce of camphor in one pound of hog's lard; take off the scum; mix as much black lead as will give the mixture an iron colour. Iron and steel goods, rubbed over with this mixture, and left with it on twenty-four hours, and then dried with a linen cloth, will keep clean for months. Valuable articles of cutlery should be wrapped in zinc foil, or be kept in boxes lined with zinc. This is at once an easy and most effective method.