Epsom salts Sulphate of magnesium. Ethiops mineral Black sulphide of mercury. Galena Sulphide of lead. Glauber’s salt Sulphate of sodium. Glucose Grape sugar. Iron pyrites Bi-sulphide of iron. Jeweller’s putty Oxide of tin. King’s yellow Sulphide of arsenic. Laughing gas Protoxide of nitrogen. Lime Oxide of calcium. Lunar caustic Nitrate of silver. Mosaic gold Bi-sulphide of tin. Muriate of lime Chloride of calcium. Nitre, or saltpetre Nitrate of potash. Oil of vitriol Sulphuric acid. Potash Oxide of potassium. Realgar Sulphide of arsenic. Red lead Oxide of lead. Rust of iron Oxide of iron. Sal ammoniac Chloride of ammonia. Salt of tartar Carbonate of potassium. Slacked lime Hydrate of calcium. Soda Oxide of sodium. Spirits of hartshorn Ammonia. Spirits of salt Hydrochloric acid. Stucco, or plaster of Paris Sulphate of lime. Sugar of lead Acetate of lead. Verdigris Basic acetate of copper. Vermilion Sulphide of mercury. Vinegar Acetic acid (diluted). Volatile alkali Ammonia. Water Oxide of hydrogen. White precipitate Ammoniated mercury. White vitriol Sulphate of zinc. THERMOMETER. The following are the formulæ for the conversion of degrees of one scale to those of another:-- (Centigrade° × 9 /5)+ 32 = Fahr.° |(Fahr.° - 32 × 4) / 9 = Réaumur°. | (Réaumur° × 9)/4 + 32 = Fahr.° |(Centigrade° × 4) / 5 = Réaumur°. | (Fahr.° 32 × 5)/9 = Cent.° |(Réaumur° × 5) / 4 = Centigrade°. FREEZING, FUSING, AND BOILING POINTS.