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Updated: August 14, 2024
Two years later, he called attention to the value of thermo-electricity as a mode of generating a current by means of heat, and since then a variety of thermo-piles have been invented, some of which have proved of considerable advantage. Wheatstone abandoned his idea of transmitting intelligence by the mechanical vibration of rods, and took up the electric telegraph.
Are there perfectly conclusive grounds for believing that the electricity of the machine, the pile, the gymnotus and torpedo, magneto-electricity and thermo-electricity, are merely different manifestations of one and the same agent? To answer this question to his own satisfaction he formally reviewed the knowledge of that day.
Three methods of generating electricity are in general use: static or frictional electricity is generated by "plate" or "static" machines; galvanic, generated by batteries based on Volta's discovery; and induced, or faradic, generated either by chemical or mechanical action. There is still another kind, thermo-electricity, that may be generated in a most simple manner.
During the last hundred years this new principle has been developed to such an enormous extent that human evolution has been entirely transformed. Nearly all the chief problems may be said to have been solved, and what remains requisite is the practical application. Thermo-electricity renders possible the direct and purposive utilisation of solar energy.
It gives magnetic polarity to the earth, and directs the needle by its influence; for magnetic attraction is only an effect of the earth's thermo-electricity, excited by the sun's rays acting in a continuous course. Both animal and vegetable life are dependent on electric forces for their development; and many of their functions, directly or indirectly, result from their agency.
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