Record of firing with 12-inch experimental cast-iron breech-loading rifle at

Sandy Hook, N. J., from June 19, 1885, to May 25, 1886-Continued.

Special remarks about each fire, such as effect on piece, sound of projectile in flight, scattering fragments, &c.

Fired into sand-butt to try powder.

Block opened easily, but closed with difficulty; no escape of gas.
Before firing clasp on rear of obturator stem replaced by screw-nut and
asbestos gas check, lined as well as covered with asbestos cloth.
Opened with ease by one man after firing, and similarly closed after load.
ing, but with more difficulty. Considerable quantity of partially-con-
sumed grains of powder.

Good flight Fired over water for range. Time of flight, 11 seconds

Range (yards). 5,329

Good flight Fired over water for range. Time of flight, 11 seconds.

Lost.

Good flight Fired over water for range. Time of flight, 113 seconds.

5, 304

Good flight Fired over water for range. Time of flight, 11 seconds..

5, 292

Before firing this round the unlocking lever lengthened 4 inches; translating lever 3 inches:

(Fired into sand butt. Cartridge in two sec-
tions, 13 prisms of black powder at base of
each.

A small amount of unconsumed powder picked up.

A small amonnt of unconsumed powder picked up. Block unlocked partially at discharge.

Record of firing with 12-inch experimental cast-iron breech-loading rifle at

Sandy Hook, N. J., from June 19, 1885, to May 25, 1886– Continued.

Special remarks about each fire, such as effect on piece, sound of projectile in flight, scattering of fragments, &c.

Good flight

Good flight

Gun mounted on old 12-inch carriage.
Small amount of unconsumed powder.

Fired into sand butt.

Fired over water.

Time of flight, 10 seconds....

Range (yards). 4,719

Time of flight, 97 seconds....

4,716

Fired into sand butt. Buffers considerably injured.

Before this round, holes in piston-head of cylinder were reduced from inch to inch and spring catch in locking lever replaced by set-screw.

Fired into sand butt. Small amount of unconsumed powder.

Record of firing with 12-inch experimental cast-iron breech-loading rifle at