Abstract
It is possible, by the use of a nomogram devised by Dr. James B. Friauf (Journal of the Franklin Institute, Vol. 232, pp. 151–174, 1941) for the solution of spherical triangles, to make simple nomograms for the computation of tidal gravity. Two types of such nomograms are explained and illustrated. The first is for computations at a fixed latitude on the earth; the second is for computations at a fixed point. With the second type the computation of tidal gravity is reduced to a simple routine matter, especially if The American Air Almanac is used as the source of the astronomical data needed. The accuracy of these nomograms is studied and a comparison is made of this new method with that recently devised by Dr. Adler (Geophysics, Vol. 7, pp. 35–44, 1942).
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