Appletons' Popular Science Monthly, April 1899: Volume LIV, No. 6, April 1899Various
Science
Appletons' Popular Science Monthly, April 1899: Volume LIV, No. 6, April 1899
Various
Science -- Periodicals; Technology -- Periodicals
redistributing of the materials so that the fine particles may be in
close mechanical union when subjected to the heat of the kiln."
=The French Nontoxic Matches.=--It is believed, by Frenchmen at least,
that the problem long sought, of finding a composition for a match
head in which all the advantages of white phosphorus shall be
preserved while its deleterious qualities are eliminated or greatly
reduced, has been solved in the new matches which the French
Government has placed upon the market. These matches are marked S. C.,
by the initials of the inventors, MM. Sévène and Cahen, are made in
the factories at Trélazé, Begles, and Samtines, and have been well
received by the public. In preparing the composition, the chlorate of
potash of the old flashing and safety matches has been retained, and
the sesquisulphide of phosphorus is used instead of the white or red
phosphorus of the old matches. The latter substance, besides the
indispensable qualities of fixity and resistance to atmospheric
influences, has the two important properties of inflaming at 95° C.,
much nearer the igniting point of white phosphorus (60° C.) than of
red (260° C.), and being therefore easier to light; and of having a
low latent or specific heat. With these properties embodied in the
inflammable composition of the head, the new match is expected to be
comparatively free from accidental explosions during manufacture and
export, to take fire by friction, and to burn steadily and regularly.
The expectation has so far been fulfilled. The phosphorus compound has
a special odor, in which the sulphur characteristic predominates, but,
not boiling under 380° C., does not become offensive in the shops; and
the match heads made with it do not emit the phosphorescence which is
often exhibited by matches made with white phosphorus. It is only
feebly toxic by direct absorption, experiments on guinea pigs
indicating that it is only about one tenth as much so as white
phosphorus.
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