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Updated: May 20, 2025
He did not, however, neglect his Lombard language, but composed in it a treatise on the art of defending towns. The Mantuan historian, Volta, says that some of Sordello's Provençal poems exist in manuscript in the Vatican and Chigi libraries at Rome, in the Laurentian at Florence, and the Estense at Modena.
I had the pleasure of going over this ground with Kohlrausch in 1849, and his experiments left no doubt upon my mind that the contact electricity of Volta was a reality, though it could produce no current.
"No" shouts a woman who sells fruit, and who was one of a group on the corner of Via Alessandro Volta. "It was a delegato! It was the police!"
The light of the spark was intense, and the spark itself of great dimensions. "Volta then spoke: 'My friend, your arrival on the surface of our planet is a sensation. We are all delighted. You have solved our difficulties. With this transmitter you can yourself send to the earth the message you wish. And this receiver will catch the waves of the smallest amplitudes.
The discoveries of Volta and Galvani were in like manner independent of theory; the greatest discoveries consisting in bringing to light certain grand facts, on which theories are afterwards framed. Our inventor had been pursuing the Baconian method, though he did not think of that, but of inventing a safe lamp, which he knew could only be done through the process of repeated experiment.
But the bar of the Ancobra is shallow, only giving six feet, although it is firm and settled, not like that of the Volta and Lagos; and the Portuguese, in the sixteenth century, used to get up this river, and work the country to a better profit than we do nowadays.
Volta had found that two dissimilar metals in contact will produce a current by chemical action, and Seebeck showed that heat might take the place of chemical action. The direction of the current, indicated by the arrow, is from the bismuth to the antimony across the joint, and from the antimony to the bismuth through the external wire.
At one table sat Mary Somerville, Leverrier, Adams, La Place, Gauss and Helmholz; at another Dalton, Schonbeim, Davy, Tyndall, Berthollet, Berzelius, Priestly, Lavoisier, and Liebig; here were groups of physicists Faraday, Volta, Galvani, Ampere, Fahrenheit, Henry, Draper, Biot, Chladini, Black, Melloni, Senarmont, Regnault, Daniells, Fresnel, Fizeau, Mariotte, Deville, Troost, Gay-Lussac, Foucault, Wheatstone, and many, many more.
Rich ground is denoted by a peculiar vegetation, especially of ferns. Gold is guarded here not by a dragon, but by a monstrous baboon; and when golden dogs are found the finder dies. In 1862 I visited with Major de Ruvignes Great Sankánya, a village west of the Volta, where a large gold-field was reported.
"I stood an instant stupified and overcome. The deep voice of a salutation came to my ears, and turning I saw the face of Volta. Beside me was a large induction coil, and above it two huge plates of copper about ten feet apart. The next instant a flash passed between the electrodes, and I was caught and turned aside with my companions.
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