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:

Benzoin7 oz.
Tolu balsam7 oz.
Tincture of tonka7 oz.
Essence of vetiver7 oz.
Alcohol20 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:

Benzoin1 lb.
Musk¾ oz.
Myrrh3½ oz.
Tolu balsam3½ oz.
Tincture of orris root1 pint.
Oil of rose15 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.

Benzoin7 oz.
Cascarilla3½ oz.
Cardamoms3½ oz.
Mace1¾ oz.
Musk150 grains.
Peru balsam1¾ oz.
Storax1¾ oz.
Tolu balsam1¾ oz.
Olibanum3½ oz.
Orris root14 oz.
Civet150 grains.
Cinnamon7 oz.
Oil of bergamot1½ oz.
Oil of lemon1½ oz.
Oil of geranium¾ oz.
Oil of lavender¾ oz.
Oil of neroli150 grains.
Alcohol2 qts.

Of course, this liquid must be filtered after prolonged maceration. By adding to it 1½ oz. of glacial acetic acid we obtain the so-called fumigating vinegar which is very useful for expelling bad odors.