These new matches can be prepared with gum or glue. In the first case, dispose beforehand a mixture of equal parts of gum arable and water, so as to have a viscous solution.

In 2 ounces of that solution mix 1 1/3 ounce of finely divided chlorate of potash, add the same quantity of powdered amorphous phosphorus, and 6 1/2 drachms of powdered glass. This mixture is spread on a hollow marble about 1 1/2 to 2 inches thick, so as to form a coating about 1 inch thick, which is kept at the same height, by adding some of the paste from time to time. Dip into it the end of the matches, which should have been sulphuretted beforehand.

If instead of gum you use gelatin, which ad-7 heres more strongly, and resists atmospheric influences better, take nice white gelatin, and let it macerate from two to four hours in twice its weight of water, and afterwards dissolve it over a water-bath heated to 122° for about 20 minutes. To 75 parts of that solution, add 40 parts of chlorate of potash in powder, 40 parts of amorphous phosphorus, and 20 parts of powdered glass. The mixture is spread on a marble, the temperature of which is kept at 105° by steam produced by a water-bath. Pour it on to the sulphuretted end of the match, and dry as usual.*

Some of these matches take fire only on being struck on a particular kind of rubber. Their paste is thus prepared: -

Amorphous Phosphorus • • • • 6 parts Sulphuret of Antimony • • • 2 to 3 " Glue ..................................... 1 part

♦ Amorphous phosphorus costing two dollars a pound, instead of ninety cents, the price of the ordinary phosphorus, renders these matches a little more costly, hut they are not dangerous nor venomous.

The rubber is prepared by laying over one side of a paste-board the following composition: -

Amorphous Phosphorus • • . . 10 parts Binox. Manganese, or Sulph. Antimony . 8 "

Glue....... 3 to 6 "

All those compositions must be well mixed, carefully avoiding pulverizing the chlorate of potash with the combustible substances.