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Updated: May 14, 2025
In such a case, as far as the body itself is concerned, only frictional losses in the inside could occur. It is a striking fact that the discharge through a gas is established with ever increasing freedom as the frequency of the impulses is augmented. It behaves in this respect quite contrarily to a metallic conductor.
Just as in the case of frictional electricity, the kind of electricity which is supplied by a certain metal depends on whether the other metal with which it is coupled stands to the right or to the left of it in the series.1 Let us now see what happens in a galvanic cell when the two different metals are simultaneously exposed to the chemical action of the connecting fluid.
He demonstrated that frictional and atmospheric electricity are the same. Franklin and others sent the electric charge along a wire, but it did not occur to them to endeavor to apply this to sending messages. Credit for the first suggestion of an electric telegraph must be given to an unknown writer of the middle eighteenth century.
Associates it with Italians and fluency generally, with Volta, Galvani, Marconi and so on. The proper British electricity is that high-grade useless long-sparking stuff you get by turning round a glass machine; stuff we used to call frictional electricity. Keep it in Leyden jars.... At Claverings here they still refuse to have electric bells.
Under the general principle that the local slope of a river is the result and measure of the resistance of its bed, it is evident that a narrow and deep stream should have less slope, because it has less frictional surface in proportion to capacity; i.e., less perimeter in proportion to area of cross section.
The most important practical result of the early experiments with frictional electricity was Benjamin Franklin's great discovery of the identity of lightning and the electric spark. One day in June, 1792, he went to the common at Philadelphia and flew a kite beneath a thundercloud, taking care to insulate his body from the cord.
But one is aware that the molecules of a conductor are practically in contact with each other, and that if one for any reason rotates, the next one to it would, from frictional action, cause the one it touched to rotate in the opposite direction, whereas, the evidence goes to show that all rotation is in the same direction. How can this be explained mechanically?
The frictional resistance of screw propellers is always a fruitful source of inefficiency. With a given screw, the loss due to friction may be taken to vary approximately as the square of the speed. This is not to say that the frictional resistance is greater in proportion to the thrust at high than at low speeds.
He dropped several parcels in the vain attempt to hold them and perform the usual frictional movement notwithstanding; so he was compelled instead to go through a kind of solemn pace, which got more and more rapid as the parcels decreased in number, till it became at last, in its wild movements, something like a Highlander's sword-dance.
The hollow dark countryside re-echoed like a shell with shouts and calls and excited voices. Restlessness and nervous excitement, nervous hilarity were in the air. There was a sense of electric surcharge everywhere, frictional, a neurasthenic haste for excitement. Every moment Aaron Sisson was greeted with Good-night Good-night, Aaron Good-night, Mr. Sisson.
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