An Universal Dictionary of the Marine / Or, a Copious Explanation of the Technical Terms and Phrases Employed in the Construction, Equipment, Furniture, Machinery, Movements, and Military Operations of a Ship. Illustrated With Variety of Original Designs of Shipping, in Different Situations; Together With Separate Views of Their Masts, Sails, Yards, and Rigging. to Which Is Annexed, a Translation of the French Sea-terms and Phrases, Collected from the Works of Mess. Du Hamel, Aubin, Saverien, &c.

by William Falconer

These beds are placed upon very strong frames of timber, which are fixed in the bomb-ketch, and represented in fig. 14. plate [VI]. They are securely attached to the frames, by means of a strong bolt of iron, fig. 15. called the pintle, passing perpendicularly through both, and afterwards through one of the beams of the vessel. Thus the pintle, which passes through the hole in the centre of the plan, fig. 10. serves as an axis to the bed; so that the mortar may be turned about horizontally as occasion requires.

Plate [VI]. fig. 9. represents the elevation of the bed of a 10 inch sea-mortar; fig. 10 is the plan, and 11 the front view thereof; fig. 12 exhibits the plan, and fig. 13 the elevation of the bed-bolster.

We have already observed, that the bomb, which is usually called the shell by artillery-people, is a great hollow ball, charged with powder. Fig. 16 is a perspective view of the bomb, and fig. 17 a section of it, whereby the thickness is exhibited. The parts a and b of the shell are its handles, by which it is lifted up or removed; and c is the fuse-hole, or aperture, through which the powder is poured in to charge it.

It appears, by fig. 17, that the lower part of the shell is thickest, by which it becomes heavier on that side, and accordingly falls thereon, and never on the fuse. It is also the better enabled thereby to resist the impression of the powder, by which it is discharged from the mortar. Both of these reasons, however, Mr. Muller conceives to be immaterial, because nothing but an absolute stoppage of the air can exhaust the fuses, as their composition enables them to burn in water, as well as air or earth; and the explosion of the mortar would not, in his opinion, be able to break them, if they are equally thick every where. The most proper quantity of powder to charge a bomb is probably two thirds of the weight which would fill the cavity.

The fuse of the bomb is represented by c d, fig. 17. It is generally a conical tube, formed of beech, willow, or some dry wood, and filled with a composition of sulphur, salt-petre, and mealed-powder. The bomb being charged, this fuse is inserted in the cavity through the fuse-hole; and when fired, communicates the fire to the powder in the shell.

The fuses for bombs are charged with great care, that nothing may prevent them from communicating the fire to the powder in the centre of the bomb. They are driven into the shell so as that only about an inch and a half comes out beyond the fuse-hole; and then the shell is said to be fixed.

These fuses are also charged long before there is occasion to use them; and that the composition with which they are filled may not fall out, or be damaged, by growing damp, the two ends are covered with a composition of tallow, mixed either with pitch or bees wax. When the fuse is to be put into the shell, the little end is opened or cut off; but the great end is never opened till the mortar is to be fired[^[40]].

When the proper quantity of powder, necessary to charge the mortar, is put into the chamber, it is covered with a wad, well beat down with the rammer. After this the fixed shell is placed upon the wad, as near the middle of the mortar as possible, with the fuse-hole uppermost, and another wad pressed down close upon it, so as to keep the shell firm in its position. The officer then points the mortar, or gives it the inclination necessary to carry the bomb to the place designed. When the mortar is thus fixed, the fuse is opened; the priming-iron is also thrust into the touch-hole of the mortar to clear it, after which it is primed with the finest powder. This done, two of the matrosses, or sailors, taking each one of the matches, the first lights the fuse, and the other fires the mortar. The bomb, thrown out by the explosion of the powder, is carried to the place intended; and the fuse, which ought to be exhausted at the instant of the shell’s falling, inflames the powder contained therein, and bursts the shell into splinters; which, flying off circularly, occasion incredible mischief wheresoever they reach.

Necessary orders before a bombardment by sea.

When any fixed shells are issued from the tenders, the artillery people on board are immediately to fix others in their room, and are always to keep in their tenders the same number they had at first.