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Updated: June 9, 2025
Nor, indeed, could the action of the battery, the different metals of which were in contact with each other, decide the point in question. Still, as regards the identity of electricities from various sources, it was at that day of great importance to determine whether or not the voltaic current could jump, as a spark, across an interval before contact. Faraday's friend, Mr.
It was found later that when the two bodies are rubbed together they become oppositely electrified, and that the two electricities are always generated in equal quantity; so that if the two bodies are held in contact after the rubbing has ceased the two electricities come together again and the electrical phenomena disappear. They have been added together, and the result is zero.
Volta admits that the discharges of the opposite electricities in the torpedos and the gymnoti are made by their own skin, and that when we touch them with one hand only, or by means of a metallic point, we feel the effect of a lateral shock, the electrical current not being directed solely the shortest way. Mr.
The usual telegraph-line is efficient with only iron wire. We habitually use the words "conductor" and "conduct" in reference to the electric current. A definition of that common term may be useful. It is a relative one. A conductor is any substance whose atoms, or molecules, have the power of conveying to each other quickly their electricities.
The wires joining each set of plates are the poles of the condenser, and when these are connected in the circuit of a current the condenser is charged. It can be discharged by joining its two poles with a wire, and letting the two opposite electricities on its plates rush together.
Electrical combinations play an important part in its operations, and for the minute examination of different worlds, a different diffusion of electricities is necessary.
The electricity is therefore applied in gentle proportions at first, and then the operation is repeated several times. It is electricity that, as I have said, gives colour to plants. Their varied tints depend on the sympathy or attraction of their electricity to sun and light electricities.
As in the case of the blood of animals, which is called by the common name of blood in spite of material differences, when the species is different, so we have a generic name for all electricities, a term signifying "A spark of Heaven power."
Neither wishes to commit himself to the notion of a current compounded of two electricities flowing in two opposite directions: but the time had not come, nor is it yet come, for the displacement of this provisional fiction by the true mechanical conception.
In naming fish, I refer to each species, and not merely to those already known to you as electrical, and which have the power of emitting strong currents of their own peculiar electricity. A huge fish, well known on your earth, supplies us with the most powerful of all electricities an electricity of immense value.
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