Daily press. [volume] (Newport News, Va.) 1896-current, 1898-05-02
GuN-COTTON.
-~NT~.A
ST " J
SAFEST OF THE HIGH EXPLOSIVES
FOR NAVAL WARFARE ...

Something About Its Qualities and the
Way in Which 1t is tIsde-Precautionst to
Make It Non Explosive in the ships Mag
axine-A Remarkable Discovery.
"Gun-cotton," said an ordnance Off
Ger few days ago, when asked about
the qualities of this substance which
is used in the torpedoes carried by the
ships Of the Navy, lis by far the safest
OF any of the high explosives. That IS
the reason it is chosen instead OF the
nitro glycerine preparations, which,
although they will produce more pow
erful effects. are very dangerous things
to have on shipboard. They can be
exploded too easily, by the application
of heat, by a shock, and, under some
conditions. by spontaneous combus-
ton. But the gun-cotton. as long as
it is kept wet. is absolutely safe, and
there Is no trouble about preserving
the necessary degree of moisture"
Precisely the same opinion regarding
gun-cotton as an explosive for naval
warfare was expressed by the superin-
tendent of one OF the largest powder
had much experience in the making of
gun-powder and gun-cotton. M .
Not only is gun-cotton absolutely
inert and harmless SO long as it is
wet he said. but it does not neces-
sarily follow that ii will explode even
when dry. OF course. it is then much
more liable to do so, but il it is undis-
turbed in any way a considerable
quantity of it might remain dry with
out any accident. In our works we
are extremely careful about the way in
which we handle dry gun-cotton. but
there is no need of any precautions
when it is wet. On shipbuari
the disks OF dry cotton which are
used as primers TO detonate the wet
are always kept away from the maya
zines, either on deck or in one of the
cabins. The only danger from them
would be in case they were dropped
while being handled. The result then
would not always perhaps not usually
be an explosion, but you never can
tell with certainty. One of the disks
might be dropped half dozen times
and not explode, and the next time,
under apparently the same conditions
1t would go Off
The process by which so common
and harmless a substance as cotton is
converted into a high explosive is a
comparatively simple one. Pure raw
cotton or ordinary cotton waste is
stepped in Il solution OF one part of nj
trlc acid and three parts of sulphuric
acid. The nitric acid is the one which
renders the cotton explosive, the pres
ence OF the sulphuric being required
only to absorb the water. thus allow
ing the other acid to combine more
reaul!y with the nearly pure celulOse
OF which cotton consists. After the
cotton has soaked in the acids for sew
eral hours, it is taken from the pots
and squeezed through heavy rollers to
extract all the superiuous acid which
it has not absorbed. Then it is wash
ed carefully and thoroughly, still with
the same object of removing the free
acid.
1T is now passed through machine
similar to that which grinds up the
rags in a paper-mill. Here ii is crush
ed thoroughly and afterward washed
again until the last trace of free acid
disappears, and the cotton comes Out in
the form of 4 soft, White pulp. closely
resembling the pulp OF which paper
is made. This concludes the process
or actual manufacture, and it now re-
mains only to convert the gun-cotton
into the most convenient form for the
use to which it is To be put. If il is
to be employed in making powder. it
Is dried and stored away In pulverized
form, but if it is designed for 6llinp
torpeuoes 1t must be compressed 10 n
| certain density and moulded into the
shapes which will best enable it ia ha
packed into the torpedo heads. If m
compressed and dry, the gun-co,1on is
extremely light. weighing no more
than ordinary cotton batting. SO safe
| from explosion, unless uelonated is q
brlck OF wet guncolton. that it NAV
| be placed upon hot Goals. AS tl,e
moisture dries off from the oulside
the cotton fakes Off and burns mn
| quietly.