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Updated: May 2, 2025
"Frankly, I am pained not to see the name of Henry there associated with those of Arago and Sturgeon, for it is known and generally conceded among men of science that his researches and experiments and the results which he reached were of radical importance and value, and that they deservedly rank with those of Ampere, Arago and Sturgeon.
Par LOUIS PERRET. Ouvrage publié par Ordre et aux Frais du Gouvernement, sous la Direction d'une Commission composée de MM. AMPERE, INGRES, MERIMÉE, VITET. It consists of four volumes of elaborate colored plates of architecture, mural paintings, and all works of art found in the catacombs, with one volume of inscriptions, reduced in fac-simile from the originals, and one volume of text.
Should we have reached the electric telegraph by any amount of striving for a means of instantaneous communication, if Franklin had not identified electricity with lightning, and Ampère with magnetism?
He therefore very happily calls Tasso an elevated Werther. "Then, concerning Faust, his remarks are no less clever, since he not only notes, as part of myself, the gloomy, discontented striving of the principal character, but also the scorn and the bitter irony of Mephistopheles." In this, and a similar spirit of acknowledgment, Goethe often spoke of M. Ampere.
Following them came a group of master builders, among whom may be mentioned: Volta of Italy, Oersted of Denmark, Ampere of France, Ohm of Germany, Faraday of England, and Joseph Henry of America. Among these men, who were, it should be noted, theoretical investigators, rather than practical inventors like Morse, or Bell, or Edison, the American Joseph Henry ranks high.
Ampère, acting upon the suggestion of La Place, an eminent mathematician, published a plan for a feasible telegraph. This was later improved upon by others, and it was still early in the nineteenth century that a model telegraph was exhibited in London. About this time two professors at the University of Göttingen were experimenting with telegraphy.
If the electrolytic apparatus is provided with a mechanism for the rotation of the electrode or stirring of the electrolyte, proceed as follows: Arrange the resistance in the circuit to provide a direct current of about one ampere. Pass this current through the solution to be electrolyzed, and start the rotating mechanism.
He was at this time full of the theory of Ampere, and it cannot be doubted that numbers of his experiments were executed merely to test his deductions from that theory. Starting from the discovery of Oersted, the illustrious French philosopher had shown that all the phenomena of magnetism then known might be reduced to the mutual attractions and repulsions of electric currents.
Again, the discovery of voltaic electricity, and the marvellous development of knowledge, in that field, effected by such men as Davy, Faraday, Oersted, Ampère, and Melloni, had brought to light a number of facts which tended to show that the so-called 'forces' at work in light, heat, electricity, and magnetism, in chemical and in mechanical operations, were intimately, and, in various cases, quantitatively related.
The strength of current in the circuit must also be taken into account. To yield a good light such a lamp requires or "takes" about 1/2 an ampere.
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