rchase
into the bore and back it to the breech-purchase.

Nos. 7 and 8 un-key and throw back cap-squares and choke luffs of
side-tackles, or, if rolling deeply, hitch them round the straps of
the blocks.

Nos. 9 and 10 provide breech-purchase and assist 1 and 2 in adjusting
it.

No. 11 chokes luff of train-tackle, or hitches it, if required;
provides and hooks tackle of muzzle-purchase; belays and lowers.

No. 12 provides and hooks tackle of breech-purchase; belays and
lowers.

These preparations made, all the numbers man the breech-tackle fall,
or divide themselves to bowse upon both falls together, as the
position of the gun in the battery may render either mode most
convenient.

At the word "Dismount!" the gun is swayed out of the carriage.

Nos. 3 and 4 attend chocking-quoins, and 11 attends train-tackle, if
required.

All the numbers, excepting 11 and 12, who attend purchase-falls, move
up to their ordinary stations for serving the gun, unhook
side-tackles, and remove the old carriage, under the direction of No.
1: and--

At the word "Mount!" the same men bring the new carriage into position
for mounting.

At the word "Lower!" Nos. 11 and 12 lower the gun into its place; all
the numbers then proceed, respectively, to reverse what they had done
in dismounting.

Guns on covered decks may also be dismounted by means of a
muzzle-lashing, the runner and the train-tackles, assisted by the
handspikes.

The gun is run in and laid square under the housing-bolt, the bed and
quoin removed, the muzzle elevated and secured as in the housing
position; then, after un-keying and throwing back the cap-squares, the
breech is bowsed up clear of the carriage by means of the
train-tackle, hooked in the eye of a runner, the block of which hooks
in an eye-bolt in the beam over the gun. If preferred, this mode of
dismounting may be adopted by substituting the muzzle-lashing for the
toggle-block of the griolet, and toggling the runner-block in the hole
made in the deck for the breech-purchase of the griolet.

THROWING GUNS OVERBOARD.

509. The gun's crew being assembled at Quarters, remove the pin and
chock from the cascabel, into the jaws of which place a selvagee
strap; hook the double block of the train-tackle into the housing-bolt
over the port, and its single block into the selvagee strap; remove
the cap-squares, and place a round block of wood on the sill of the
port, high enough to let the chase bear on it wh