,* at the equator. By this frac- Compnta-tion tof theamount ofdiminution. Fig. 11 * Let D be the equatorial diameterof the earth, F the versed sine of an arc,corresponding to the motion in a secondof time, and c the chord, or arc ( for thechord and arc of so small a portion of thecircumference will… … Or F= ~D (1) The value of c is found by dividing the whole circumferenceinto as many equal parts as there are seconds in the time ofrevolution. But the time of revolution is 23 h. 56 m. 4 s., ~86164 seconds. The whole circumference is Therefore, (3.1416)D;(3.1416)D (2) By this value of c, we have…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
