If the spots are fresh, rub them over with a piece of cloth that has been dipped into pulverized china clay, repeating the operation several times, and then brush with soap and water. When the spots are old brush with distilled water and finest French plaster energetically, then bleach with chloride of lime that is put on a piece of white cloth. If the piece of marble is small enough to permit it, soak it for a few hours in refined benzine.

Preparation for Cleaning Marble, Furniture, and Metals, Especially Copper

This preparation is claimed to give very quickly perfect brilliancy, persisting without soiling either the hand or the articles, and without leaving any odor of copper. The following is the composition for 100 parts of the product: Wax, 2.4 parts; oil of turpentine, 9.4 parts; acetic acid, 42 parts; citric acid, 42 parts; white soap, 42 parts.

Removing Oil Stains from Marble

Saturate fuller's earth with a solution of equal parts of soap liniment, ammonia, and water; apply to the greasy part of the marble; keep there for some hours, pressed down with a smoothing iron sufficiently hot to warm the mass, and as it evaporates occasionally renew the solution. When wiped off dry the stain will have nearly disappeared. Some days later, when more oil works toward the surface repeat the operation. A few such treatments should suffice.

Cleaning Terra Cotta

After having carefully removed all dust, paint the terra cotta, by means of a brush, with a mixture of slightly gummed water and finely powdered terra cotta.

Renovation of Polished and Varnished Surfaces of Wood, Stone, etc

This is composed of the following ingredients, though the proportions may be varied: Cereal flour or wood pulp, 38.5 parts; hydrochloric acid, 45 parts; chloride of lime, 16 parts; turpentine, 0.5 part. After mixing the ingredients thoroughly in order to form a homogeneous paste, the object to be treated is smeared with it and allowed to stand for some time. The paste on the surface is then removed by passing over it quickly a piece of soft leather or a brush, which will remove dirt, grease, and other deleterious substances. By rubbing gently with a cloth or piece of leather a polished surface will be imparted to wood, and objects of metal will be rendered lustrous.

The addition of chloride of lime tends to keep the paste moist, thus allowing the ready removal of the paste without damaging the varnish or polish, while the turpentine serves as a disinfectant and renders the odor less disagreeable during the operation.

The preparation is rapid in its action, and does not affect the varnished or polished surfaces of wood or marble. While energetic in its cleansing action on brass and other metallic objects, it is attended with no corrosive effect.

Nitrate of Silver Spots

To remove these spots from white marble, they should be painted with Javelle water, and after having been washed, passed over a concentrated solution of thiosulphate of soda (hyposulphite).

To Remove Oil-Paint Spots from Sandstones

This may be done by washing the spots with pure turpentine oil, then covering the place with white argillaceous earth (pipe clay), leaving it to dry, and finally rubbing with sharp soda lye, using a brush. Caustic ammonia also removes oil-paint spots from sandstones.