After bright grates have been thoroughly cleaned, they should be dusted over with unslaked lime, and thus left until wanted. All the coils of piano wires are thus sprinkled, and will keep from rust for many years. Table-knives which are not in constant use, ought to be put in a case in which sifted quicklime is placed about eight inches deep. They should be plunged to the top of the blades, but the lime should nut touch the handles.