. Bulletin. Science. Figure 15.—Another form of the differential arc-light regulator of Lacassagne and Thiers. Two circuits—one permitting and one stop- ping the flow of mercury from the reservoir (a)—controlled the position of the float, to which the lower carbon was fixed. A similar differential principle formed the basis for all the later successful regulators. From J. Dredge, Electric Illumination, London, (about 1882), vol. I, p. 392. invented by Faraday himself in November 1831. He called this new device a magnetoelectric generator, in contrast to the electrostatic generator; later,
. Bulletin. Science. Figure 15.—Another form of the differential arc-light regulator of Lacassagne and Thiers. Two circuits—one permitting and one stop- ping the flow of mercury from the reservoir (a)—controlled the position of the float, to which the lower carbon was fixed. A similar differential principle formed the basis for all the later successful regulators. From J. Dredge, Electric Illumination, London, (about 1882), vol. I, p. 392. invented by Faraday himself in November 1831. He called this new device a magnetoelectric generator, in contrast to the electrostatic generator; later, the term was shortened to "; This first mag- netoelectric generator was, interestingly enough, the converse of Barlow's "wheel," a simple electric motor. Faraday's generator could not produce sparks or electrolyze water, but it did deflect the needle of a galvanometer. A somewhat more efficient device was produced by Hippolyte Pixii, who had been instrument-maker. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution; United States. Dept. of the Interior; United States National Museum. Washington, Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off
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