522. TO CLEAN MARBLE, SIENNA, JASPER, PORPHYRY, &c.
Mix up a quantity of strongest soap-lees with quicklime, to the consistence of milk, and lay it on the stone, &c., for 24 hours; clean it afterwards with soap and water, and it will appear as new. This may be improved by rubbing or polishing it afterwards with fine putty powder and olive oil. This is a beautiful article for cleaning marble monuments, &c.
523. TO CLEAN SILVER FURNITURE
Lay the furniture piece by piece upon a charcoal fire; and when they are just red, take them off and boil them in tartar and water, and your silver will have the same beauty as when first made. Try this method once and you will never forsake it; it will not remove a portion of the silver, as article that are sold in vials, boxes, &c., for this purpose will do.
524. A FINE BLACK VARNISH
Take 2 ozs. of bitumen of Palestine, 2 ozs. of resin, and 12 ozs. of umber; melt them separately, and afterwards mix them together over a moderate fire; then pour upon them, while on the fire, 6 ozs. of clear boiled linseed oil, and keep stirring the whole from time to time; take it off the fire, and, when pretty cool, pour in 12 ozs. of essence of turpentine. This varnish is for coaches and iron work.
525. TO PAINT SAIL-CLOTH, SO AS TO MAKE IT PLIANT, DURABLE, AND WATER-PROOF
Grind 96 lbs. of English ochre with boiled oil, and add to it 16 lbs. of black paint; dissolve 1 lb. of yellow soap in one pail of water, on the fire, and mix it while hot with the paint. Lay this composition, without wetting it, upon the canvass, as stiff as can conveniently be done with the brush, so as to form a smooth surface; the next day, or the day after, (if the latter, so much the better,) lay on a second coat of ochre and black, with a very little, if any, soap; allow this coat a day to dry, and then finish the canvass with black paint.