- At any point a sounding line would hang in the line of the radius of
**curvature**of the water surface. - If w is the weight of a locomotive in tons, r the radius of
**curvature**of the track, v the velocity in feet per sec.; then the horizontal force exerted on the bridge is wv 2 /gr tons. - This result created a great sensation, and proved that Transatlantic electric wave telegraphy was quite feasible and not inhibited by distance, or by the earth's
**curvature**even over an arc of a great circle 3000 m. - Starting from an observation of Marconi's, a number of interesting facts have been accumulated on the absorbing effect of sunlight on the propagation of long Hertzian waves through space, and on the disturbing effects of atmospheric electricity as well as upon the influence of earth
**curvature**and obstacles of various kinds interposed in the line between the sending and transmitting stations.4 Electric wave telegraphy has revolutionized our means of communication from place to place on the surface of the earth, making it possible to communicate instantly and certainly between places separated by several thousand miles, whilst The Electrician, 1904, 5 2, p. 407, or German Pat. - In general it is not
**curvature**, but change of**curvature**, that presents difficulty in the laying-out of a line.

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- curvature

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