MERCURY.
On July 1 Mercury sets a few minutes after 9 in the evening.
Mercury can be readily found, early in July, a few degrees south of
the point of sunset; the planet moves rapidly southward, but can be
followed, and may be seen as late as the 20th. On July 18 Mercury has
nearly the declination of Regulus.
Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 81 / 157 题