Lowell, Percival, 1855-1916 · New York, The Macmillan Company · leaf 262
Diagram of libration in longitude due to rotation. singular systematic sway stood revealed the librationin longitude caused by the eccentricity of the planetsorbit. Mercury revolves about the Sun in an ellipse moreeccentric than that of any other principal planet. Attimes he is half as far off… … DEATH OF A WORLD 223 For both reasons, nearness and speed, his angularrevolution about the Sun varies greatly from point topoint according to where he finds himself in his orbit.His rotation, however, is necessarily uniform. For eventhe Sun has no power at once to change the enormousmoment of…
Cosmogony
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Aureus hic liber est : non est preciosior ulla g ema kalendario : quod docet istud opus : aureus hic numerus, lun[a]e solisq[ue] labores monstrantur facile : cunctaq[ue] signa poli, quotq[ue] sub hoc libro terr[a]e per longa regantur tempora, quisq[ue] dies, mensis, & annus erit : scitur in instanti quecunq[ue] sit hora diei ; hunc emat astrologus qui uelit esse cito](https://img.insideoutlibrary.com/img/200/ia-aureushiclibere00regi-38-0.webp)
