Note 40 — Chapter V · (continued 2)

The Fougasses and Camouflets, used in mining, are employed for different purposes. The fougasses are small mines, whose line of resistance is only six to six and two-thirds feet. They are used to defend large posts. Bomb fougasses are nothing more than fougasses, charged with bombs containing powder. To estimate the effects of bomb fougasses, artillerists have ascertained the exact quantity of powder contained in each kind of bomb. A bomb of eight and a half inches weighs forty-six and a half pounds; it requires four and a half pounds of powder to fill it; but one pound will burst it. The eighteen inch bomb, or cominage, weighs nearly five hundred and seventy-one pounds, and contains forty pounds of powder Thirteen pounds of powder will burst it. The camouflet is a small fougasse, made to act against the enemy's mines, to suffocate and poison their branch. The camouflet is also used to act against the sides of the crater of a mine that has been sprung. See Science of War and Fortification, vol. 2d, p. 286.