f both projectiles fulfill the above test, the lot will be accepted.

If, one of the shots fails to pass the test here prescribed, a
supplementary test shall be made by firing the third shot under the
same conditions as the first two shot; if this passes the test as
prescribed above, the lot shall be accepted; if it fails to do this,
the lot shall not be accepted.

--------------+-------------+----------------+-------------
Calibre of | Weight of | Thickness of | Velocity for
shot | shot | plate | penetration
--------------+-------------+----------------+-------------
4-inch | 33[3] | { 4-inch | 1,930
| | { 5-inch | 2,295
| | |
4.7-inch | 45[3] | 5-inch | 2,220
| | |
5-inch | 58 | { 5-inch | 2,005
| | { 6-inch | 2,320
| | |
6-inch | 106 | { 6-inch | 1,950
| | { 8-inch | 2,450
| | |
8-inch | 316 | { 8-inch | 1,760
| | { 10-inch | 2,100
| | |
10-inch | 604 | { 10-inch | 1,745
| | { 12-inch | 2,020
| | |
12-inch | 1,046 | 12-inch | 1,730
--------------+-------------+----------------+-------------

[3] Weight uncapped.

For intermediate thickness the velocity shall be determined by
interpolation.

(b) Armor-piercing shell. Two capped shell, sandloaded to standard
weight, shall be fired against a hard-faced Harveyized armor plate
secure to a timber backing in a manner satisfactory to the Chief of
Ordnance, of 3-inches thickness for 5-inch and 6-inch shell, 4-inches
for 8-inch shell, 5-inches for 10-inch shell, and 6-inches for 12-inch
shell, with a velocity[4] of about 1,420 f.s. for the 5-inch shell,
1,220 f.s. for the 6-inch shell and 920 f.s. for the 8-inch, 10-inch
and 12-inch shell at impact, with the requirement that the shell shall
go through the plate unbroken, and then be in a condition for effective
bursting.