A 3-inch metal fuze will burn seven seconds, and is calculated for ranges not exceeding 1,900 yards. A 4-inch metal fuze will burn ten seconds, and is not to be used at a greater distance than 2,400 yards.
Bickford’s Water Fuze, which burns about two or three feet in a minute, may be advantageously used for exploding gunpowder under water, for the destruction of booms, vessels, &c.
GREASE.
The composition used for greasing wheels is composed of equal parts of tallow and coarse sweet oil melted together, and it is made up in kegs of 28 lb. each. In warm weather the proportion of tallow must be increased.
GRENADES, HAND.
A Land service Hand grenade weighs 1 lb. 13 oz., and may be thrown from 40 to 60 feet. The diameter of the Fuze composition is ·2 of an inch, length 2·25 inches, and weight 3 drams.
Fuze Composition.
Saltpetre, 3 lb. 4 oz.; Sulphur, 1 lb.; Mealed powder, 2 lb. 12 oz.
On service the Grenades are charged with 1½ oz. of powder.