Gathmann Gun
a gun invented by Louis Gathmann, a Chicago mechanician and inventor, which is capable of throwing great masses of high explosives by means of gunpowder. It is a rifled cannon, unjacketed, and with no re-enforcements at the breech. Its bore is 13 inches, 1 inch larger than in any cannon heretofore made by the government. The shell is 7 feet long and contains 400 pounds of wet guncotton. There is a plunger at the end which, when it strikes an object, explodes the percussion cap which sets fire to some dry powder, that in turn sets off some dry guncotton , which on bursting lets loose the terrible A GATINEAU