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Updated: June 29, 2025


Of course we have no books of reference here, but Sir Henry says that if his memory does not fail him, there was a tremendous revolt in Babylon about 500 BC, whereon a vast multitude were expelled from the city.

But the other portion, BC, pressing vertically against the concave surface, BK, becomes gradually diminished in its velocity in relation to the earth, and produces and effect known as "reaction."

It is not, however, of his victories that we are here to speak, but of his return march from the banks of the Indus, in BC 326, when he had newly recovered from the severe wound which he had received under the fig tree, within the mud wall of the city of the Malli.

Friedrich, I presume, at this late hour of four, may bc snatching a morsel of dinner; his orderlies are silently speeding, plans taken, orders given: To start all, at eight in the evening, for the Bridge of Striegau; there to cross, and spread to the right and to the left. Silent, not a word spoken, not a pipe lighted: silently across the Striegau Water there.

Whence it is easy to recognize this chief property of refraction, namely that the Sine of the angle DAE has always the same ratio to the Sine of the angle NAF, whatever be the inclination of the ray DA: and that this ratio is the same as that of the velocity of the waves in the transparent substance which is towards AE to their velocity in the transparent substance towards AF. For, considering AB as the radius of a circle, the Sine of the angle BAC is BC, and the Sine of the angle ABN is AN. But the angle BAC is equal to DAE, since each of them added to CAE makes a right angle.

Suppose two lines perpendicular one to the other, and therefore forming a right angle, AB and BC. Suppose at their junction, B, a considerable zone or segment, SSS, of a circle, as shaded in the following diagram.

They were first created BC. 198, to attend to the epulum Jovis, and the banquets given in honour of the other gods, which duty had originally belonged to the pontifices. Julius Caesar added three more, but that alteration did not last. They formed a collegium, and were one of the four great religious corporations at Rome with the pontifices, the augures, and the quindecemviri. Smith, Diet, Ant. v.

This being so, it necessarily follows that every line intersecting one of these waves at right angles will pass above the point A, always excepting the one line which is perpendicular to the horizon. Let BC be the wave which brings the light to the spectator who is at B, and let BD be the straight line which intersects this wave at right angles.

The downward impact pressure, AB, is always somewhat greater than the horizontal reaction, BC, and any proportions between these two can only be accurately ascertained by trials. In these particular experiments the jet of water flowed 40 ft. per second through an orifice of 0.05 square inch area, and in every case its course was bent to a right angle.

Then BC, which is obviously equal to AD, represents the distance which the moon virtually falls towards the earth in one minute. Actual computation, based on measurements of the moon's orbit, showed this distance to be about fifteen feet.

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