Pierce the time-train cone at right angles to the axis and through the division in the cover corresponding to the desired number of seconds. Then remove the safety-pin before inserting the projectile in the bore of the piece. A fuze-cutter is issued by the Ordnance Department for use with the fuze. THE FRANKFORD ARSENAL BASE PERCUSSION-FUZE "C," MODEL 1894, FOR FIELD-GUN SHELL. [Illustration: FIG. 47.] [Illustration: FIG. 48.] This fuze weighs 4.88 ounces and consists of a brass body (_a_) which contains the complete plunger. The head of the body is closed by a brass cap-screw (_b_) which contains a brass primer (_d_) that is filled with the composition (_m_); and the cap-screw is closed by a brass closing-screw (_c_). _c_ and _d_ have holes through them, as indicated, for the passage of the flame from the primer to the bursting-charge of the projectile. The head is covered by disks of paper and tinfoil. The face of the composition (_m_) nearest the plunger is covered by a disk of tinfoil (_e_) and a copper restraining-disk (_f_). =The Plunger= consists of a steel firing-pin (_i_), firmly fixed in a brass igniter plunger-spindle (_h_), and this spindle fits in a brass igniter plunger-sleeve (_g_) which has a groove (_t′_) on its lower interior surface. A split brass safety-ring (_i_), which holds the igniter plunger-sleeve in the safety position, is slipped over the lower end of the spindle, and then the spindle-sleeve, containing two grooves (_s_ and _t_), is slipped on and firmly secured by spreading the lower end of the spindle. The inclination of the groove (_s_) determines the resistance of the safety-ring, which, in this fuze, has the minimum and maximum limits of 142 and 160 lbs. respectively. (It was formerly 15 lbs.) When the piece is discharged the plunger-sleeve overcomes the resistance of the safety-ring and carries it to the rear; the diameter of the ring is slightly increased during its passage along the spindle, and when in the proper position for so doing it fits partly in both grooves (_t_ and _t′_), binding sleeve and spindle firmly together. The point of the firing-pin now projects beyond the plunger-sleeve and the fuze is armed. When the projectile strikes, the complete plunger is thrown forward, the point of the firing-pin pierces the restraining-disk and ignites the composition. Fig. 47 shows the position of the parts before the piece is discharged, and Fig. 48 during the flight of the projectile. RANGE TABLE FOR 3.2 INCH B. L. RIFLE. Shrapnel, 13.5 pounds. Muzzle velocity, 1685 ft.-sec.