Distance from the parapet of a battery, the parapet being 8 feet high, for Mortars at the following elevations:—
| Elevation | 45 | 30 | 20 | 15 | 10 degrees. |
| Distance | 12 | 13 | 21 | 30 | 40 feet. |
PART V.
STORES, IMPLEMENTS, COMBUSTIBLES, ETC.,
REQUIRED IN BATTERIES.[9]
BALLS, LIGHT.
Light Balls are thrown from mortars at night, to discover the operations of the enemy’s working parties, &c.
Light balls burn from 10 to 20 minutes.
| Composition. | |||||
| lb. | oz. | lb. | oz. | ||
| Saltpetre, pulverized | 6 | 4 | Rosin, pounded | 1 | 14 |
| Sulphur, ground | 2 | 8 | Linseed oil, boiled | 0 | 7½ |
BALLS, SMOKE.
Smoke balls are fired from mortars to suffocate the men in mines, &c., or to prevent them continuing their work. They are also used to conceal manœuvres, &c., from an enemy.