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Updated: May 2, 2025
The author, though confident in the extreme, neither impeaches the honesty of those whose opinion he assails, nor allots them any future inconvenience: in these points he is worthy to live on a globe and to rotate in twenty-four hours. I chanced to reside near Plymouth when Mr. Rowbotham lectured there in October 1864.
Another plan, and perhaps a better one, is to have about three fields, and rotate in such a manner that a marketable crop may be always kept growing in the third field. Any crop may be selected, the chief labor of which falls between July and the following March. Late cabbage and potatoes, or celery, will do if the ground is suitable for these crops. Kale and spinach are staple fall crops.
But one is aware that the molecules of a conductor are practically in contact with each other, and that if one for any reason rotates, the next one to it would, from frictional action, cause the one it touched to rotate in the opposite direction, whereas, the evidence goes to show that all rotation is in the same direction. How can this be explained mechanically?
I shall not bore you with it, but I think you will see in a moment why it is necessary, perhaps why some one who knew thought it would never be used. "What I am getting at now is that some substances with the same chemical formula rotate polarized light to the right, are dextro- rotary, as, for instance, what is known as dextrose.
If the apple, without rigid connection with the orange, were carried round the orange so as to move precisely as if it were so connected, it would unquestionably have to rotate on its axis, as any one will find who may try the experiment. Thus for the straight rod thrust through the apple substitute a straight horizontal bar carrying a small basin of water in which the apple floats.
In the modern "dynamo" we cannot help having friction at the bearings and contact pieces, it is true, but there should be no other friction. The moving coils of wire or "armatures" should rotate freely without touching the iron pole-pieces of the fixed portion of the machine. In fact friction would be fatal to the action of the "dynamo." How then does it act?
If he had as many legs as a centipede, they would tire before night. His two short limbs seem to him entirely inadequate to the task. He would like to have as many legs as a wheel has spokes, and rotate about in the same way.
It is clear, first, that if the ring-system did not rotate, the forces thus acting on the material of the rings would immediately break them into fragments, and, dragging these down to the planet's equator, would leave them scattered in heaps upon that portion of Saturn's surface.
A O is the virtual train-arm; let the center, A, of the cross move to the position B, then since the angles A O B at the center, and A C B in the circumference, stand on the same arc, A B, the former is double the latter, showing that the cross revolves twice round the center O during each rotation of C; and since A C B = A D B, C and D rotate with equal velocities, and these rotations and the revolution about O have the same direction.
The American soldier had this advantage over the British soldier, that he used, if not generally, at least in some cases, not the smooth-bore musket but the grooved rifle by which the ball was made to rotate in its flight. The fire from this rifle was extremely accurate.
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