Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 396
ASTRONOMY. 3^9 proper motion of about ten seconds per century towardsthe east. Proctor has shown that five out of the sevenstars which form the Great Dipper have a common proper … motion, as shown in Fig. 427 (see also Fig. 420). He pro-poses for this phenomenon the name of Star-Drift.
Astronomy
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