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Updated: April 30, 2025
At B we have the case of superposed magnetism of equal external value, rendering the wire or rod apparently neutral, although a lower series of molecules are rotated in the opposite direction to the upper series, giving to the rod opposite and equal polarities. At C we have the molecules arranged in a circular chain around the axis of a wire or rod through which an electric current has passed.
During these researches I have remarked a peculiar property of magnetism, viz., that not only can the molecules be rotated through any degree of arc to its maximum, or saturation, but that, while it requires a comparatively strong force to overcome its rigidity or resistance to rotation, it has a small field of its own through which it can move with excessive freedom, trembling, vibrating, or rotating through a small degree with infinitely less force than would be required to rotate it permanently on either side.
This can then be put on a wiper which will snugly fit the bore, and the barrel may then be put in the lathe and rotated at a high rate of speed with the wiper in the bore, and during the rotation the wiper is drawn in and out. This operation should be continued for an hour at least, frequently withdrawing it to add more of the polishing grit." "What is the best grit to use?"
On the other hand, if the moon rotated so slowly that its other face would be exposed to us in the course of the revolution, the tides would then be dragged violently over its surface in the direction of its rotation; their tendency would thus be to accelerate the speed until the angular velocity of rotation was equal to that of revolution.
Such amazement as dominated his puny features I have rarely seen equalled. "Qu'est-ce que vous avez foutu avec cette machine-la?" At which cry the planton staggered, rotated, brought his gun clumsily off his shoulder, and stared, trembling all over with emotion, at his superior. "La-bas!" screamed the pimply sergeant de plantons, pointing fiercely in our direction.
When I released them it appeared that they had been attracted by Chu Chu's graces, and had offered her overtures of affection, to which she had characteristically rotated with this miserable result. I led her, with some difficulty, warily keeping clear of the riata, to the inclosure, from whose fence I had previously removed several bars.
Under ordinary circumstances this substance exerted no unusual action on light, but when it was placed between the poles of a powerful electro-magnet, and the light was passed through it in the same direction as the magnetic flux, the plane of polarization of the light was rotated in a certain direction.
Now here, now there, on the hills, and in the meadows, appeared villages, the sun sparkled in the window-panes of the cottages, and upon the roofs of yellow straw; the crosses of the churches gleamed through the foliage of the trees, the gray wings of the mills rotated lazily through the air, the smoke from the chimneys of a factory curled skyward in thick black wreaths. . . . On all sides was the gleaming water, on all sides were space and freedom, cheerfully green meadows, and graciously clear blue sky; in the quiet motion of the water, restrained power could be felt; in the heaven above it shone the beautiful sun, the air was saturated with the fragrance of evergreen trees, and the fresh scent of foliage.
This furnace consists of a cast iron revolving cylinder, averaging 25 feet in length and 4 ft. 4 in. in diameter, which revolves on four friction rollers, resting on truck wheels, rotated by ordinary gearing. The power required for effecting the revolution should not exceed four indicated horse-power.
The valve, A, is operated automatically by the following arrangement: A mariner's compass, P, placed in the head of the torpedo has its needle connected to one pole of a powerful battery, D. A dial of non-magnetic material marked with the points of the compass is capable of being rotated by the connections shown.
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