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Updated: May 29, 2025
The glass of the jar represents the gutta-percha; the internal coating is the surface of the copper wire; the external coating is the surrounding metallic envelope and water. To form an idea of the capacity of this new kind of battery, we have only to remember that the surface of the wire is equal to fourteen square yards per mile.
In the old cable the copper wire was covered but three times with gutta-percha, while in the new it is covered four times with the purest gutta-percha and four times with Chatterton's patent compound, by which the cable is rendered absolutely impenetrable to water.
One patent claims rubber or gutta-percha dissolved in linseed oil as a vehicle in which to grind the pigment; another the same dissolved in naphtha or bisulphide of carbon as a pigment; another hard rubber, ground. Enameling with different materials is proposed by some, while one proposes to glaze the bottoms so that barnacles and grass would find a slippery foothold.
These Americans refused to give up. The daring Cyrus Field, who had risked his whole fortune to promote this undertaking, called for a new bond issue. It sold out immediately. Another cable was put down under better conditions. Its sheaves of conducting wire were insulated within a gutta-percha covering, which was protected by a padding of textile material enclosed in a metal sheath.
He advocated the use of gutta-percha, then a new material, for the insulation of underground wires, and in 1847 designed a screw-press for coating the wires with the gum rendered plastic by heat. The following year he laid the first great underground telegraph line from Berlin to Frankfort-on-the-Main, and soon afterwards left the army to engage with Mr.
This was of course very pleasant: but from that time to this, though the wires test very well, not a signal has come from Spartivento. I got the cable into a boat, and a gutta-percha line from the ship to the boat, and we signalled away at a great rate but no signs of life.
The fever of colonization has attacked the forest and here and there it rages; for certain it will not be a long time before that vast extension of tropical vegetation with the extraordinary fertility of its soil will give place to plantations of Parah-rubber, gutta-percha, coffee, sugar, rice, tobacco, etc.
And yet, to be an ideal rider, man wants but little here below, nor is it at all likely he will want that little long. He wants or rather, needs a skull of best spring steel; a spinal column of standard Lowmoor; limbs of gutta-percha; a hide of vulcanised india-rubber; and the less brains he has, the better.
The tall one was showing the other a section of a submarine cable and letting the hard piece, intricately braided of hemp, metal and gutta-percha, pass from hand to hand. From his choppy, whispered sentences, the company learned that in 1877 he had worked as electrical engineer on a steamer laying a cable between Europe and the United States.
Before closing this chapter I may mention that there is a considerable plantation of gutta-percha trees in the horticultural garden at Buitenzorg. Treub.
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