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It was now a parabolic curve. Presently the surface diminished a little. The yacht was increasing its distance from it. Hoddan used the telescope. He searched the space ahead with full-width field. He found the liner. It rose steadily. The grid still thrust it upward with an even, continuous acceleration. It had to be not less than forty thousand miles out before it could take to overdrive.
They are sometimes naked, but as a rule their brightness is tempered by globes of ground or opal glass. In search-lights a parabolic mirror projects all the rays in any one direction, and in lighthouses the arc is placed in the focus of the condensing lenses, and the beam is visible for at least twenty or thirty miles on clear nights.
Sometimes he showed glimpses of the brave gentleman of Conde's army, parabolic flashes of will such as may, in times of emergency, tear through politics like bomb-shells, and may also, by virtue of honesty and courage, make a man condemned to live buried on his property an Elbee, a Bonchamp, or a Charette.
The seaman's eye turned in the direction indicated, and he beheld Bourassin's horse stopped by the hairy forehead of a buffalo-bull, while Bourassin himself was in the act of describing a magnificent parabolic curve over the buffalo's back. He alighted on his back, fortunately on a low bush, a yard or two beyond the buffalo's tail.
We can scarcely help seeing that our Lord here, in a very striking and unusual way, mingles prose prediction with parabolic imagery. Some commentators object to this, and take the armies and the burning to be only part of the imagery, but it is difficult to believe that.
To destroy this divergence, and to profit by all the light of the lamp, was the task to be accomplished, before lighthouses could be rendered useful to the full extent. The application to this purpose of deep metallic mirrors, known under the name of parabolic mirrors, has been found effectual to the purposes required.
"The parabolic reflector over there catches these light vibrations and focuses them on the cell of selenium which you perhaps noticed in the centre of the reflector. You remember doubtless that the element selenium varies its electrical resistance under light? Thus there are reproduced similar variations in the cell to those vibrations here in this transmitter.
So any one might have reasoned, from the behaviour of the birds, as they continued their attack upon the dog now rising some feet above him, and then darting downward in a sort of parabolic curve at each swoop drawing nearer and nearer, until the tips of their wings were almost flapped in his face.
In the years when firearms were less perfected than they are at present, it was necessary, in shooting with a rifle, to aim lower than the mark, in order to allow for an upward kick at the discharge; and, on the other hand, it was necessary, in shooting with heavy ordnance, to aim higher than the mark, in order to allow for a parabolic droop of the cannon-ball in transit.
Thus He deepens and fulfils one precept of the old law by extending the sweep of its prohibition from acts to thoughts, by setting obedience to it above sacrifice and worship, and by picturing in solemn tones of parabolic warning the consequences of having the disobeyed precept as our unreconciled adversary.
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