A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 398
Fig. 191. —Atmosphere of Venus as seen during aTransit. (Vogel, 1882.) 682. Delisles Method. — Halleys method requires the use of -polarstations, uncomfortable and hard to reach, and also that the weathershould permit the observer to see both the beginning and end of thetransit. Delisles method, on…
Astronomy
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