Polished iron-work may be preserved from rust by a mixture not very expensive, consisting of copal varnish intimately mixed with as much olive oil as will give it a degree of greasiness, adding thereto nearly as much spirit of turpentine as of varnish. The cast iron-work is best preserved by rubbing it with black-lead. But where rust has begun to make its appearance on grates or fire-irons, apply a mixture of tripoli with half its quantity of sulphur, intimately mingled on a marble slab, and laid on with a piece of soft leather: or emery and oil may be applied with excellent effect, laid on with a spongy piece of the fig-tree fully saturated with the mixture. This will not only clean but polish, and render the use of whiting unnecessary. TO CLEAN MARBLE. Take verdigris and pumice-stone, well powdered, with lime newly slacked. Mix with soap lees, to the consistence of putty. Put it in a woollen rag, and rub the stains well one way. Wash off with soap and water. Repeat, if not removed. TO CLEAN FLOOR-CLOTHS. Sweep them and wipe them with a damp flannel, after which wet them all over with milk, and rub them till bright with a dry cloth. N. B. Floor-cloths should be chosen that are painted on fine cloth, well covered with colour and perfectly dry. The durability of the cloth depends greatly on these points, and particularly on its having had time for the paint to get quite dry. Old carpets answer extremely well, if painted and hung up to season some time, before they are laid down for use. TO CLEAN LOOKING-GLASSES. Remove fly stains or any other soil from the glass with a damp cloth, then polish with a woollen cloth and powder-blue. TO TAKE SPOTS OF GREASE OR OIL OUT OF BOARDS. Drop a few drops of oil of turpentine on the spots and rub it hard with your finger; this will dissolve the grease, and make it mix with the soap (or suds) and water when the room is washed. _Another Way._ Mix together fuller’s-earth and soap lees, and rub them on the boards. Let the mixture dry, and then scour it off with strong soft soap and sand, or use lees to scour it with. It should be put on hot, by heating the lees. TO EXTRACT LAMP OIL, &C. OUT OF STONE OR MARBLE HALLS, &C. Mix well together a pint of strong soap lees, some fuller’s earth, well dried, and a little pipe-clay, powdered fine; lay it on the part which is oiled, then put a hot iron upon it till dry. If all the oil come not out the first time, repeat it, and rub it well in. By doing it two or three times it will come out. THE UNDER HOUSE MAIDS.