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Updated: May 20, 2025
But the electro-motive force, ascribed by Volta to the metals, when in contact, is a force which, as long as a free course is allowed to the electricity it sets in motion, is never expended, and continues to be excited with undiminished power in the production of a never-ceasing effect.
Then came the discoveries of Galvani and Volta, followed by the demonstrations of Galvani's nephew Aldini, whereby dead animals were made to display the movements of life, not only by the electricity of the Voltaic pile, but, as Aldini especially showed, by a transfer of this mysterious agency from one animal to another.
Volta, his contemporary and countryman, finally solved the problem as to the reason why. and made that "Voltaic Pile" which came to be our modern "battery." Acting upon the hint given by Galvani's accident, this pile was made of thin sheets of metal, say of copper and zinc, laid in series one above the other, with a piece of cloth wet with dilute acid interposed between each sheet and the next.
As soon as taken, the fish are opened and salted, and serve as an excellent supply of provisions to navigators. All the coast of Africa, from Cape Bojador, otherwise called Cabo della Volta, as far as Cape Branco and even to Arguin, is low and sandy.
Working along lines suggested by Galvani's discovery, Volta constructed an apparatus made up of a number of disks of two different kinds of metal, such as tin and silver, arranged alternately, a piece of some moist, porous substance, like paper or felt, being interposed between each pair of disks.
Among them I can pause to mention only those of Volta, the Italian, to whose discoveries the battery is due; Oersted, the Dane, who first discovered the magnetic properties of the electric current; Ampere and Arago, the Frenchmen, who prosecuted still further and most successfully similar researches; then Sturgeon, the Englishman, who may be said to have made the first electro-magnet; next, and not least illustrious among these illustrious men, our countryman Henry, who first showed the practicability of producing electro-magnetic effects by means of the galvanic current at distances infinitely great; and finally Steinheil, the German, who, after the invention of the Telegraph in all its material parts was complete, taught, in 1837, the use of the ground as part of the circuit.
There was never a side-show on the Riva that we did not interrupt our work to go and see it; whether it was the circus in the little tent, with the live pony, the most marvellous of all sights in Venice; or the acrobats tumbling on their square of carpet; or the blindfolded, toothless old fortune-teller, whose shrill voice I can still hear mumbling "Una volta soltanta per Napoli!" when she was asked if Naples, this coming summer, as the last, would be ravaged by cholera.
Lieutenant Fiske began by paying a tribute to the remarkable pioneer efforts of Colonel Samuel Colt, who more than forty years ago blew up several old vessels, including the gunboat Boxer and the Volta, by the use of electricity. Congress voted Colt $17,000 for continuing his experiments, which at that day seemed almost magical; and he then blew up a vessel in motion at a distance of five miles.
What had I done with all that? It seemed to me that a strange voice repeated an old romance that I had long since forgotten: Altra volta gieri biele, Blanch' e rossa com' un flore, Ma ora no. Non son piu biele Consumatis dal' amore. My sorrow was too great; I sprang to my feet and once more began to walk the floor.
Dante, in his De Vulgari Eloquentia, informs us concerning the structure of this musical setting: it might be continuous without repetition or division; or it might be in two parts, one repeating the other, in which case the stanza was also divided into two parts, the division being termed by Dante the diesis or volta; of these two parts one might be subdivided into two or even more parts, which parts, in the stanza, corresponded both in rimes and in the arrangement of the lines.
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