Fumigating Pastils; Incense Pastilles. These are small masses essentially composed of powdered charcoal and aromatic substances that emit fragrant fumes during combustion, with the addition of sufficient nitre or saltpetre to cause them to slowly consume away, without flame, when kindled. Their common form is that of a small cone with a triangular or tripod base, of about 7/8 to 1 inch in height, and about 1/2 inch diameter at the larger part. This form is most simply and conveniently given them by pressing the mass, whilst soft, into a mould of lead or porcelain. The dry ingredients should be first reduced to fine powder, and the balsams and essential oils (if any) being added, the whole should be thoroughly and perfectly incorporated, after which the mixture should be beaten to the consistence of a stiff ductile mass or dough with the liquid ordered for the purpose. When powdered gum is one of the ingredients, the mass should be beaten up with water; but otherwise mucilage must bo employed. Gum-tragacanth, owing to its greater thickening and binding powers, is here generally preferred to gum-arabic. The charcoal of the light woods, as the linden, willow, and alder, make the best pastils; that of the first being most esteemed for this purpose in France. The following receipts are among the best that can be made, and will serve as examples of these articles, from which the operator will be able to devise others:

1338. Dr. Paris's Fumigating Pastils

1338.  Dr. Paris's Fumigating Pastils. Pulverize 1/4 pound benzoin, 1/4 pound cascarilla, 11/4 ounces myrrh, and 11/2 pounds charcoal; mix them through a sieve; then add 3/4 ounce each of attars of nutmegs and of cloves ; dissolve 2 ounces of nitre in sufficient mucilage of tragacanth to make the whole into a stiff paste ; beat well in a mortar, make into pastils, and dry.

1339. Perfumers' Fumigating Pastils

1339.    Perfumers' Fumigating Pastils. Take of gum benzoin, 8 ounces (avoirdupois); olibanum (in tears), 14 ounces; storax (in tears), 1 ounce; cascarilla and gum-tragacanth, of each | ounce ; nitre, 2 ounces; charcoal, 11/4 pounds; mix, and beat them up with water or rose water.

1340. Piesse's Fumigating Pastils

1340.    Piesse's Fumigating Pastils. Dissolve 3/4 ounce nitre in 1/2 pint rose water; mix this with 1/2 pound willow charcoal, and dry it thoroughly in a warm place. When the nitrated charcoal is perfectly dry, pour upon it a mixture of 1/2 drachm each of the attars of thyme, caraway, rose, lavender, cloves, and santal; then stir in 6 ounces benzoic acid (flowers of benzoin); mix thoroughly through a sieve, then beat in a mortar with sufficient mucilage to bind together. Make into pastils, and dry.

1341. Basis for French Pastils

1341.    Basis for French Pastils. Take of charcoal, 11/2 pounds avoirdupois; nitre, 2 ounces; gum-tragacanth, 1 ounce; mix in the dry state. It is used as a basis for the following French pastils, as well as many others:—