HISTORICAL.-I, History of Astronomy (forming part of the article Astronomy) ; Constellation; Ancient Eclipses (in article Eclipse) ; 2, Astrolabe; Armillary Circle; Dial.
Thirty-two short articles on individual constellations are given (see table at the end of the article Constellation). These contain, besides a reference to the mythology of the constellation, notes on the principal objects of astronomical interest.
Further articles deal with various phenomena of fundamental importance either cosmically or from their effect on questions of practical life :—Precession of the Equinoxes, Aberration of Light, Equation of Time.