We think about you all very much at times, and talk over affairs of Nelson Square, but I think we dwell more upon the illnesses and nursings and upon the sudden calls and chats rather than the regular parties. Pray remember us both to Mrs. Phillips and the damsils—I hope the word is not too familiar.
I am Dear Phillips,
Most Truly Yours,
M. Faraday.
R. Phillips, Esq.,
&c., &c., &c.
TEN DAYS OF SPLENDID WORK.
September 24 was the third day of his experiments. He began (paragraph 21) by trying to find the effect of one helix of wire, carrying the voltaic current of ten pairs of plates, upon another wire connected with a galvanometer. “No induction sensible.” Longer and different metallic helices (paragraph 22) showed no effect; so he gave up those experiments for that day, and tried the effects of bar magnets instead of the ring magnet he had used on the first day.
Fig. 5.
In paragraph 33 he says:—
An iron cylinder had a helix wound on it. The ends of the wires of the helix were connected with the indicating helix at a distance by copper wire. Then the iron placed between the poles of bar magnets as in accompanying figure ([Fig. 5]). Every time the magnetic contact at N or S was made or broken, there was magnetic motion at the indicating helix—the effect being, as in former cases, not permanent, but a mere momentary push or pull. But if the electric communication (i.e. by the copper wire) was broken, then the disjunction and contacts produced no effect whatever. Hence here distinct conversion of magnetism into electricity.
The fourth day of work was October 1. Paragraphs 36, 37, and 38 describe the discovery of induced voltaic currents:—