One of the difficulties of these experiments consisted in this, that, while the Spark runs readily along one class of substances, he cannot, or will not, run along others. Substances of the first class, comprising the metals, are called conductors; those of the second class, embracing, among other things, all resinous substances, are styled non-conductors. Now, water is a good conductor. So that although the Spark will stick to his wires when insulated on telegraph-posts on land, he will bolt from them at once and take to flight the moment he gets under water. This difficulty was overcome by coating the wires with gutta-percha, which, being a non-conductor, imprisoned the Spark, and kept him, as it were, on the line.

A copper wire covered in this manner was successfully laid between England and France in 1850. When tested, this cable did not work well. Minute imperfections, in the form of air-holes in the gutta-percha, afforded our Spark an opportunity to bolt; and he did bolt, as a matter of course—for electricity has no sense of honour, and cannot be trusted near the smallest loop-hole. The imperfections were remedied; the door was effectually locked, after which the first submarine cable of importance was actually laid down, and worked well. French and English believers turned up hands and eyes in delighted amazement, as they held converse across the sea, while unbelievers were silenced and confounded.

This happy state of things, however, lasted for only a few hours. Suddenly the intercourse ceased. The telegraphists at both ends energised with their handles and needles, but without any result. The cable was dumb. Our Spark had evidently escaped!

There is no effect without a cause. The cause of that interruption was soon discovered.

Early that morning a French fisherman had sauntered down to the port of Boulogne and embarked in his boat. A British seaman, having nothing to do but smoke and meditate, was seated on a coil of rope at the time, enjoying himself and the smells with which that port is not unfamiliar. He chanced to be a friend of that French fisherman.

“You’re early afloat, Mounseer,” he said.

“Oui, monsieur. Vill you com’? I go for feesh.”

“Well, wee; I go for fun.”

They went accordingly and bore away to the northward along the coast before a light breeze,—past the ruined towers which France had built to guard her port in days gone by; past the steep cliffs beyond Boulogne; past the lovely beach of Wimereux, with its cottages nestled among the sand-hills, and its silted-up harbour, whence Napoleon the First had intended to issue forth and descend on perfidious Albion—but didn’t; past cliffs, and bays, and villages further on, until they brought up off Cape Grisnez. Here the Frenchman let down his trawl, and fished up, among other curiosities of the deep, the submarine cable!

“Behold! fat is dis?” he exclaimed, with glaring eyes, uplifted brows, shoulders shrugged, hands spread out, and fingers expanded.

“The sea-sarpint grow’d thin,” suggested the Englishman.

“Non; c’est seaveed—veed de most ’strordinair in de vorld. Oui, donnez-moi de hache, de hax, mon ami.”

His friend handed him the axe, wherewith lie cut off a small portion of the cable and let the end go. Little did that fisherman know that he had also let our Spark go free, and cruelly dashed, for a time at least, the budding hopes of two nations—but so it was. He bore his prize in triumph to Boulogne, where he exhibited it as a specimen of rare seaweed with its centre filled with gold, while the telegraph clerks at both ends sat gazing in dismay at their useless instruments.

Thus was the first submarine electric cable destroyed. And with the details of its destruction little Robin was intimately acquainted, for cousin Sam had been a member of the staff that had worked that telegraph—at least he had been a boy in the office,—and in after years he so filled his cousin’s mind with the importance of that cable, and the grandeur and difficulty of the enterprise, that Robin became powerfully sympathetic—so much so that when Sam, in telling the story, came to the point where the Frenchman accomplished its destruction, Robin used to grieve over it as though he had lost a brother, or a kitten, or his latest toy!

We need scarcely add that submarine cable telegraphy had not received its death-blow on that occasion. Its possibility had been demonstrated. The very next year (1851) Mr T.R. Crampton, with Messrs Wollaston, Küper, and others, made and laid an improved cable between Dover and Calais, and ere long many other parts of the world were connected by means of snaky submarine electric cables.

Страница 3 из 75

Назад 1 2 3 4…75 Далее