Toilers of the Sea Part 50
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Any one who intends to construct hoisting tackle ought to provide himself with beams and small cables. But that is not sufficient. He must have cordage. Gilliatt restored the cables, large and small. He frayed out the tattered sails, and succeeded in converting them into an excellent yarn, of which he made twine. With this he joined the ropes.
The joins, however, were liable to rot. It was necessary, therefore, to hasten to make use of these cables. He had only been able to make white tow, for he was without tar.
The ropes mended, he proceeded to repair the chains.
Thanks to the lateral point of the stone anvil, which served the part of the conoid bicorn, he was able to forge rings rude in shape but strong.
With these he fastened together the severed lengths of chains, and made long pieces.
To work at a forge without a.s.sistance is something more than troublesome. He succeeded nevertheless. It is true that he had only to forge and shape articles of comparatively small size, which he was able to handle with the pliers in one hand, while he hammered with the other.
He cut into lengths the iron bars of the captain's bridge on which Clubin used to pa.s.s to and fro from paddle-box to paddle-box giving his orders; forged at one extremity of each piece a point, and at the other a flat head. By this means he manufactured large nails of about a foot in length. These nails, much used in pontoon making, are useful in fixing anything in rocks.
What was his object in all these labours? We shall see.
He was several times compelled to renew the blade of his hatchet and the teeth of his saw. For renotching the saw he had manufactured a three-sided file.
Occasionally he made use of the capstan of the Durande. The hook of the chain broke: he made another.
By the aid of his pliers and pincers, and by using his chisel as a screwdriver, he set to work to remove the two paddle-wheels of the vessel; an object which he accomplished. This was rendered practicable by reason of a peculiarity in their construction. The paddle-boxes which covered them served him to stow them away. With the planks of these paddle-boxes, he made two cases in which he deposited the two paddles, piece by piece, each part being carefully numbered.
His lump of chalk became precious for this purpose.
He kept the two cases upon the strongest part of the wreck.
When these preliminaries were completed, he found himself face to face with the great difficulty. The problem of the engine of the Durande was now clearly before him.
Taking the paddle-wheels to pieces had proved practicable. It was very different with the machinery.
In the first place, he was almost entirely ignorant of the details of the mechanism. Working thus blindly he might do some irreparable damage.
Then, even in attempting to dismember it, if he had ventured on that course, far other tools would be necessary than such as he could fabricate with a cavern for a forge, a wind-draught for bellows, and a stone for an anvil. In attempting, therefore, to take to pieces the machinery, there was the risk of destroying it.
The attempt seemed at first sight wholly impracticable.
The apparent impossibility of the project rose before him like a stone wall, blocking further progress.
What was to be done?
II
WHEREIN SHAKESPEARE AND aeSCHYLUS MEET
Gilliatt had a notion.
Since the time of the carpenter-mason of Salbris, who, in the sixteenth century, in the dark ages of science--long before Amontons had discovered the first law of electricity, or Lahire the second, or Coulomb the third--without other helper than a child, his son, with ill-fas.h.i.+oned tools, in the chamber of the great clock of La Charite-sur-Loire, resolved at one stroke five or six problems in statics and dynamics inextricably intervolved like the wheels in a block of carts and waggons--since the time of that grand and marvellous achievement of the poor workman, who found means, without breaking a single piece of wire, without throwing one of the teeth of the wheels out of gear, to lower in one piece, by a marvellous simplification, from the second story of the clock-tower to the first, that ma.s.sive monitor of the hours, made all of iron and bra.s.s, "large as the room in which the man watches at night from the tower," with its motion, its cylinders, its barrels, its drum, its hooks, and its weights, the barrel of its spring steel-yard, its horizontal pendulum, the holdfasts of its escapement, its reels of large and small chains, its stone weights, one of which weighed five hundred pounds, its bells, its peals, its jacks that strike the hours--since the days, I say, of the man who accomplished this miracle, and of whom posterity knows not even the name--nothing that could be compared with the project which Gilliatt was meditating had ever been attempted.
The ponderousness, the delicacy, the involvement of the difficulties were not less in the machinery of the Durande than in the clock of La Charite-sur-Loire.
The untaught mechanic had his helpmate--his son; Gilliatt was alone.
A crowd gathered together from Meung-sur-Loire, from Nevers, and even from Orleans, able at time of need to a.s.sist the mason of Salbris, and to encourage him with their friendly voices. Gilliatt had around him no voices but those of the wind; no crowd but the a.s.semblage of waves.
There is nothing more remarkable than the timidity of ignorance, unless it be its temerity. When ignorance becomes daring, she has sometimes a sort of compa.s.s within herself--the intuition of the truth, clearer oftentimes in a simple mind than in a learned brain.
Ignorance invites to an attempt. It is a state of wonderment, which, with its concomitant curiosity, forms a power. Knowledge often enough disconcerts and makes over-cautious. Gama, had he known what lay before him, would have recoiled before the Cape of Storms. If Columbus had been a great geographer, he might have failed to discover America.
The second successful climber of Mont Blanc was the savant, Saussure; the first the goatherd, Balmat.
These instances I admit are exceptions, which detract nothing from science, which remains the rule. The ignorant man may discover; it is the learned who invent.
The sloop was still at anchor in the creek of "The Man Rock," where the sea left it in peace. Gilliatt, as will be remembered, had arranged everything for maintaining constant communication with it. He visited the sloop and measured her beam carefully in several parts, but particularly her mids.h.i.+p frame. Then he returned to the Durande and measured the diameter of the floor of the engine-room. This diameter, of course, without the paddles, was two feet less than the broadest part of the deck of his bark. The machinery, therefore, might be put aboard the sloop.
But how could it be got there?
III
GILLIATT'S MASTERPIECE COMES TO THE RESCUE OF THAT OF LETHIERRY
Any fisherman who had been mad enough to loiter in that season in the neighbourhood of Gilliatt's labours about this time would have been repaid for his hardihood, by a singular sight between the two Douvres.
Before his eyes would have appeared four stout beams, at equal distances, stretching from one Douvre to the other, and apparently forced into the rock, which is the firmest of all holds. On the Little Douvre, their extremities were laid and b.u.t.tressed upon the projections of rock. On the Great Douvre, they had been driven in by blows of a hammer, by the powerful hand of a workman standing upright upon the beam itself. These supports were a little longer than the distance between the rocks. Hence the firmness of their hold; and hence, also, their slanting position. They touched the Great Douvre at an acute, and the Little Douvre at an obtuse angle. Their inclination was only slight; but it was unequal, which was a defect. But for this defect, they might have been supposed to be prepared to receive the planking of a deck. To these four beams were attached four sets of hoisting apparatus, each having its pendent and its tackle-fall, with the bold peculiarity of having the tackle-blocks with two sheaves at one extremity of the beam, and the simple pulleys at the opposite end. This distance, which was too great not to be perilous, was necessitated by the operations to be effected.
The blocks were firm, and the pulleys strong. To this tackle-gear cables were attached, which from a distance looked like threads; while beneath this apparatus of tackle and carpentry, in the air, the ma.s.sive hull of the Durande seemed suspended by threads.
She was not yet suspended, however. Under the cross beams, eight perpendicular holes had been made in the deck, four on the port, and four on the starboard side of the engine; eight other holes had been made beneath them through the keel. The cables, descending vertically from the four tackle-blocks, through the deck, pa.s.sed out at the keel, and under the machinery, re-entered the s.h.i.+p by the holes on the other side, and pa.s.sing again upward through the deck, returned, and were wound round the beams. Here a sort of jigger-tackle held them in a bunch bound fast to a single cable, capable of being directed by one arm. The single cable pa.s.sed over a hook, and through a dead-eye, which completed the apparatus, and kept it in check. This combination compelled the four tacklings to work together, and acting as a complete restraint upon the suspending powers, became a sort of dynamical rudder in the hand of the pilot of the operation, maintaining the movements in equilibrium. The ingenious adjustment of this system of tackling had some of the simplifying qualities of the Weston pulley of these times, with a mixture of the antique polyspaston of Vitruvius. Gilliatt had discovered this, although he knew nothing of the dead Vitruvius or of the still unborn Weston. The length of the cables varied, according to the unequal declivity of the cross-beams. The ropes were dangerous, for the untarred hemp was liable to give way. Chains would have been better in this respect, but chains would not have pa.s.sed well through the tackle-blocks.
The apparatus was full of defects; but as the work of one man, it was surprising. For the rest, it will be understood that many details are omitted which would render the construction perhaps intelligible to practical mechanics, but obscure to others.
The top of the funnel pa.s.sed between the two beams in the middle.
Gilliatt, without suspecting it, had reconstructed, three centuries later, the mechanism of the Salbris carpenter--a mechanism rude and incorrect, and hazardous for him who would dare to use it.
Here let us remark, that the rudest defects do not prevent a mechanism from working well or ill. It may limp, but it moves. The obelisk in the square of St. Peter's at Rome is erected in a way which offends against all the principles of statics. The carriage of the Czar Peter was so constructed that it appeared about to overturn at every step; but it travelled onward for all that. What deformities are there in the machinery of Marly! Everything that is heterodox in hydraulics. Yet it did not supply Louis XIV. any the less with water.
Come what might, Gilliatt had faith. He had even antic.i.p.ated success so confidently as to fix in the bulwarks of the sloop, on the day when he measured its proportions, two pairs of corresponding iron rings on each side, exactly at the same distances as the four rings on board the Durande, to which were attached the four chains of the funnel.
He had in his mind a very complete and settled plan. All the chances being against him, he had evidently determined that all the precautions at least should be on his side.
He did some things which seemed useless; a sign of attentive premeditation.
His manner of proceeding would, as we have said, have puzzled an observer, even though familiar with mechanical operations.
A witness of his labour who had seen him, for example, with enormous efforts, and at the risk of breaking his neck, driving with blows of his hammer eight or ten great nails which he had forged into the base of the two Douvres at the entrance of the defile between them, would have had some difficulty in understanding the object of these nails, and would probably have wondered what could be the use of all that trouble.
Toilers of the Sea Part 50
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Toilers of the Sea Part 50 summary
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