Muriate Tincture of Steel.—See Muriate of Iron.
Muriate of Iron.—Called Chloride of Iron. Made by dissolving iron filings in muriatic acid and crystalizing by evaporation. Crystals of green color being the result.
Nitrate of Silver.—Made by dissolving silver in nitric acid and evaporating the solution in crystals. Will dissolve in warm water. Is used for indelible ink to mark clothing and in photography. When fused and cast in small sticks is called lunar caustic.
Nitric Acid.—See Acid, nitric.
Nitric Ether.—See Ether, nitric.
Oil of Vitriol.—See Acid, sulphuric.
Pearlash.—Carbonate of potassa. An alkali obtained from the ashes of trees by leaching. When evaporated to dryness in iron kettles it is called potash, but when calcined to burn off the coloring matter it is called pearlash.
Potash.—See Pearlash. Sometimes called salts of tartar.
Pumice Stone.—A substance resembling the slag from furnaces, ejected from volcanoes. The pulverized material is used to remove the gloss and imperfections on varnished surfaces by rubbing with a woolen cloth and water.