Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 410
Fig. 138. — Atmosphere of Venus as seen during aTransit. (Vogel, 1882.) § 518] HELIOMETRIC OBSERVATIONS. 391 over, if the weather prevents the end from being visible afterthe beginning has been observed, the method fails. De lIsles method, on the other hand, employs pairs ofstations near the…
Astronomy · Constellations
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