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Updated: May 15, 2025
The men fixed by the slew-ropes to the cylinder, represent the handspikes or bars by which the windlass is turned round, and the hawser takes the place of the cable.
Upwards of a hundred of the natives now mounted the raft, and, after dividing themselves into pairs, and taking hold of the slew-ropes in their hands, pulled them up as tight as they could.
When the next signal was given, those natives who had regained their original position on the top of the cylinder threw themselves down once more, while those who already lay prostrate gathered in the slack of their slew-ropes with the utmost eagerness as the cylinder revolved another quarter of a turn.
By this effort they caused the cylinder to turn round till its further revolutions were stopped by the increasing tightness of the hawser, which was wound on the cylinder as fast as the slew-ropes were wound off it.
At this moment the men, one and all, still grasping their respective slew-ropes firmly in their hands, and without bending a joint in their whole bodies, fell simultaneously on their backs, flat on the water! The effect of this sudden movement was to turn the cylinder a full quadrant, or one quarter of a revolution. This, of course, brought a considerable strain on the hawser fixed to the anchor.
Whatever was the cause, its effect was such that many of them let go their slew-ropes, and thus cast a disproportionate share of burden on the others, whose strength, or rather weight, proving unequal to counterpoise the load, the cylinder began to turn back again.
The cylinder of course whirled round with prodigious velocity as the hawser unwound itself; and so suddenly had the catastrophe occurred, that many of the natives, not having presence of mind to let go their slew-ropes, held fast and were whisked round and round several times alternately under water beneath the cylinder and on the top of it, not unlike the spokes of a coach-wheel wanting the rim.
On a second signal being given, every alternate pair of men gradually crept up the spars by means of their slew-ropes, till one-half of the number stood once more along the top of the cylinder, while the other half of the party still lay flat on the water, and by their weight prevented the cylinder rolling back again.
In this way a great increase of power would evidently be gained by those who worked the slew-ropes. In the next place," said the Admiral, "it is clear that either the buoy-rope, or another hawser also fastened to the anchor, as a 'preventer, ought to be carried round the middle part of the cylinder, but in the opposite direction to that of the weighing hawser.
A couple of round turns were then taken with the hawser at the middle part of the cylindrical raft, after it had been drawn up as tight as possible from the anchor. A number of slew-ropes, I think about sixty or seventy in all, were next passed round the cylinder several times, in the opposite direction to the round turns taken with the hawser.
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