The paper is dipped into a solution of 3½ to 5½ ounces of saltpetre in water; after drying it is immersed in a strong tincture of benzoin or olibanum and again dried. An excellent paper is made according to the following formula: Benzoin 5½ oz. Santal wood 3½ oz. Olibanum 3½ oz. Oil of lemon grass 150 grains. Essence of vetiver 1¾ oz. Alcohol. 1 qt. For use, the paper is touched with a red-hot substance, not a flame. It begins to glow at once without bursting into flame, giving off numerous sparks and a pleasant odor. B. NON-INFLAMMABLE FUMIGATING PAPER. Papier Fumigatoire Permanent. This paper is prepared by dipping it in a hot solution of 3½ oz. of alum in one quart of water; after drying, it is saturated with the following mixture: Benzoin 7 oz. Tolu balsam 7 oz. Tincture of tonka 7 oz. Essence of vetiver 7 oz. Alcohol 20 fl. oz. This paper, when heated, diffuses a very pleasant odor and can be used repeatedly. It does not burn, and strong heat only chars it. Some manufacturers make inferior fumigating papers by dipping the alum paper simply in melted benzoin or olibanum. C. FUMIGATING RIBBONS are nothing but fine flat lamp wicks treated first with saltpetre solution and then with the preceding mixture. The wick is rolled up and placed in a vessel provided with a lamp burner. It is inserted in the burner like any other wick and when lighted burns down to the metal and goes out unless screwed up higher. Fumigating vessels provided with these wicks are very practical because, if artistic in form, they form quite an ornament to the room and can be instantly set in operation. A French formula gives the following mixture for saturating the wicks: Benzoin 1 lb. Musk ¾ oz. Myrrh 3½ oz. Tolu balsam 3½ oz. Tincture of orris root 1 pint. Oil of rose 15 grains. FUMIGATING WATERS AND VINEGARS (EAUX ENCENSOIRES, VINAIGRES ENCENSOIRES). These fluids are nothing but strong solutions of various aromatics in alcohol, a few drops of which suffice, if evaporated on a warm plate, to perfume a large room. The following is a good formula for fumigating water.