[4] Note.—Vide “Motion,” “Forces,” &c., Velocity, Gravity, and Amplitude.
[5] Vide “Tables,” “[Excentric Shot, Experiments.]”
[6] When a shot is jammed in a gun, and cannot be rammed home to the cartridge, destroy the charge by pouring water down the vent, and muzzle until the ingredients are dissolved, and cleared out of the bore; then introduce a small quantity of powder through the vent, and blow out the shot.
[7] The recoil of guns on sleighs varies from four to five feet when on rough ground or in deep snow; to twenty or thirty yards when on glare ice. In the latter case it is of course necessary to send the ammunition sleighs further to the rear; but the recoil may be considerably lessened by placing a small chain round each of the runners.
Ice of eight inches thick will bear with safety a weight of 1115 lb. (or nearly half a ton) on the square foot.
[8] Old pattern.
[9] Further information relative to mixing the composition, and filling combustibles, &c., &c., may be obtained from the “Aide Mémoire,” under the head, “Pyrotechny, Military.”
[10] This will be discontinued when Shrapnell Diaphragm shells are generally introduced into the Service.
[11] Vide Practice [Tables for Ranges, Elevations, &c.]
[12] The composition for French cannon tubes is two parts of fulminate of mercury and two of mealed powder, mixed together: then formed into a paste with distilled water, slightly impregnated with gum arabic.