The Fore Carriage-Levers require the efforts of two men at each, as the weight of the gun has most bearing there; each of the other levers is readily worked by one man.
[8] Principally to moisten the Sponge, which ought never to be omitted, as there is nothing so effectual in extinguishing any fragments that might remain burning in the Bore, and cause accidental explosion in loading, particularly in blank firing. It is a mistake to suppose that this practice increases the foulness of the Bore; on the contrary, it prevents it from hardening and accumulating, as long experience has shown. Sometimes it is convenient for the Spongers to dip the Sponge alongside, and they soon acquire the habit. Superfluous moisture is easily gotten rid of by twirling the Sponge at the handle.
[9] Were it practicable to hook a tackle so that it would move the gun, even from amidships to the port, without being shifted, or were it prudent to leave the gun free while shifting the tackle, there would be no need of a second tackle. But it is not possible, in pivoting, to exert direct action for more than the eighth of a circle by one position of a tackle, and it is absolutely dangerous at sea to leave the Slide unconfined for an instant. When, therefore, the Outer-Tackle is a-block, the second tackle must be hooked and set taut.
[10, 11, & 12] These orders are to be executed in quick succession, so as to be nearly simultaneous; that is, the compression is first relieved by backing its lever, upon which the Front-Levermen instantly bring the carriage on its trucks, and the gun is run back by the In-Tackles, the Out-Tackles being eased gradually, so as to check any violent movement; for the trucks, being fitted with friction rollers, allow the heavy piece to move suddenly and rapidly.
[ [13] The pivoting of so heavy a Gun is the most complicated of all the operations with it, and demands special drill. When done to windward, the hearty effort of the whole Gun's crew is required, particularly if there be much crown to the deck and no deck circles; to leeward there is no difficulty, and the time at sea to pivot from side to side may vary from four to seven minutes. The advantage of the Pivot-Boss will now appear, as it secures the coincidence of the hole in Slide with that of the Socket, and permits the Bolt to be removed out or in easily. Hitherto the difficulty of doing so without a Boss has caused delay, and contributed more than any thing else to the objections entertained against such heavy Ordnance, which have been in nowise obviated by either the Pivot Shifting-Screws of our own Navy, or the Pivot-Flap of the English Navy.
[14] Some difference of opinion may arise in regard to the shipping of these levers before the gun is run out, and they are required for pointing. To ship them now amounts to having them on the whole time—to which the only objection is, that if on, before wanted in pointing they may be in the way of the men; and, on the other hand, if not on, more attention may be demanded from 15, 16.
The question will not be material when the men are well drilled.
[ [15] The gun being now pivoted to the Port, the Breechings should be shackled and the rear Pivot-Bolt drawn, in regular order. But neither of these can be done without running out the gun a few feet. For in order to pivot with the greatest ease, the carriage had been previously run back on the Slide to the rear Hurter, so as to bring the weight of the gun as near as possible to the Rear pivot, the very best position being with the Trunnions of the Gun just forward of the Rear pivot. The shackling of the Breeching and the removal of the Bolt are, therefore, deferred until the Gun has been run out in the subsequent proceedings.
The Breeching is always to be shackled to the Ship's side—not to the Slide, which needlessly strains the pivoting, and also causes the shackle with its appliances to interfere with the working parts at the forward end of the Slide.
[16] It is generally expected that the Compressors are to supersede the necessity for a Breeching. But experience shows that in firing it is better to rely habitually on the Breeching, and use the Compressors to assist. Thus, in firing to windward at Sea, the Compressors are always to be set, but only so hard as may be required to ease the shock on the Breeching. In firing to leeward, the Compressors are not wanted, except to secure the gun in its place when in. When the Ship is not steady, but rolling, the discretion is to be exercised.