ascribed to it. Its composition was for a long time entirely a secret;
but it is now thought to consist principally of picric acid, which is
formed by the action of nitric acid upon phenol or phenyillic alcohol,
a constituent of coal tar. The actual nature of melenite is not
positively known, as the French government, after buying it from the
inventor, Turpin, are said to have added other articles and improved
it. This is probable, since French experiments in firing against a
partially armored vessel, the Bellequense, developed an enormous
destructive effect, while the English, who afterward bought it,
conducted similar experiments against the Resistance, and obtained no
better results than with powder. The proof that the Bellequense
experiments were deemed of great value by the French lies in the fact
that they immediately laid down a frigate--Dupuy de Lome--in which
four-inch armor is used, not only on the side, but about the gun
stations, to protect the men; this thickness having been found
sufficient to keep out melenite shell. In most armorclads, the armor
is very heavy about the vitals, but the guns are frequently much
exposed.

The best authenticated composition for melenite consists of picric
acid, gun cotton and gum arabic, and lately it is stated that the
French have added cresilite to it. Cresilite is another product of
coal tar. Melenite is normally only three times as strong as
gunpowder; but it is said to owe its destructive qualities in shells
to the powerful character of the exploder which ignites it. It has
been known for some years that all explosives (including gunpowder)
are capable of two orders of explosion according as they are merely
ignited or excited by a weak fuse or as they are powerfully shocked by
a more vigorous excitant. Fulminate of mercury has been found most
serviceable for the latter purpose. With melenite the French have