Star-land : being talks with young people about the wonders of the heavens (1891)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · London ; Paris : Cassell & Co. · leaf 118
ength of the shadow whichthat flagstaff casts at noon. It would not be correct to say The Moon. 103 that the height of the flagstaff is exactly the length ofits shadow. This will, indeed, be the case if you are for-tunate enough to make your measurement at London oncither the 6th of April or the… … Fig. 40.—How we found the Height of the Flagstaff by Measuringthe Length of the Shadow. In a similar manner, by measuring the lengths of theshadows on the moon, and by finding how many miles longthese shadows are, we are able to calculate the altitudes ofthe lunar mountains and of the ranges of…
Astronomy
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