A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 99
arc,A B, than d e which is nearly parallel to its arc D E. Thus the arcs of rightascension are shortest at the equinoxes, and longest at the solstices;while the divisions coincide at all these four points. 137. A Mean Solae Day is the average of all the solardays throughout the year. It is divided… … TIME. 95 a. Because used for the general purposes of civil and social life, itis also called the civil day. Clocks are regulated to show its beginningand end, and the equal division of it into hours, minutes, and seconds.As already stated, it is four minutes longer than a sidereal day. b. If the…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
