DAY’S MARCH: Of field artillery, 153.
DEFILADE: Definition, 156.
DEPTH OF PENETRATION of balls, 149-50.
DESCENT of falling bodies: Law of, 159.
DIAMETER: Of coehorn mortar, 33;
of eprouvette, 33;
of stone-mortar, 33;
of cast-iron shot, how found, 95;
of shot, shells, and spherical case, 105;
of vent, 16.
DIMENSIONS: Of cannon, how regulated, 11;
of a parapet to resist field artillery, 156.
DIPPING OF THE MUZZLE, 77-8.
DISCHARGES: Number an iron gun can sustain, 39.
DISH, of a wheel, 124.
DIRECTION, how given: To guns and howitzers, 51-2;
to mortars, 56-8
—At night, 55, 59
—When wheels are not on same level, 54.
DISTANCE: For firing field pieces, 46
—Ascertained by sound, 151
—Determined by a tangent scale, 158
—Of recoil, 77
—Of ricochet battery from object, 74.
DISPART: Definition, 13.
DOLPHINS: Definition, 19;
pieces furnished with, 19.
DRIVING OUT shot wedged in the bore, 21.
ELEVATION: Necessity for, 51
—How given to guns and howitzers, 52;
to mortars, 56;
instruments for, 52
—Angle of, for mortars 67;
greatest angle _in vacuo_, 66;
angle of, for ricochet fire, 74.
ELEVATING ARC, 18.
EMBARKING: Artillery and its stores, 161-2.
ENFILADE: Definition, 156.
ENFILADING a work, 73-4-5
—Object to be fired at, 73.
EPROUVETTE, 11;
form of chamber, 32
—Calibre, 33
—Use of, 34
—Bed, 33, 131
—Length of bore, 33.
EXPANSION of hot shot, 96.
EXTERNAL injury to cannon, 23-4.
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