Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 68
ridian. If Z is the zenith of thepoint A, the meridian zenith distance of Sat A, reduced to the centre of the earth, isthe angle ZCS. In the same manner thetrue meridian zenith distance of S at G isthe angle ZCS. The difference of these twozenith distances, or the angle ZCZ, is evi-dently the… … 62 FORM OF THE EARTH. 63. Results,—By the process above described, or by proc«esses of a similar character, arcs of different meridians, andin different latitudes, have been carefully measured. The sumof the arcs thus measured is more than 60°, and the length ofa degree of the meridian has been…
Astronomy
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