Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 267
r, towards t, its most remote position,the interval between the consecutive eclipses of the satel-lite gradually grew longer, whilst in moving from t backagain to 2] these intervals grew shorter. The total retarda-tion in passing from T to t, was found to be nearly 16£minutes, and the total… … Fig. 155 light had to travel further and further at each eclipse toreach the observer, whilst in the second case, the reversehappened. Rcemer therefore inferred that it required 161 minutes fora ray of light to traverse the diameter of the earths orbit,or 8i minutes for it to pass over the radius…
Physics
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