The chief star of Virgo, Spica, is remarkable for its pure white light. To my eye there is no conspicuous star in the sky equal to it in this respect, and it gains in beauty when viewed with a glass. With the aid of the map the reader will find the celebrated binary star Gamma ([gamma]) Virginis, although he will not be able to separate its components without a telescope. It is a curious fact that the star Epsilon ([epsilon]) in Virgo has for many ages been known as the Grape-Gatherer. It has borne this name in Greek, in Latin, in Persian, and in Arabic, the origin of the appellation undoubtedly being that it was observed to rise just before the sun in the season of the vintage. It will be observed that the stars [epsilon], [delta], [gamma], [eta], and [beta], mark two sides of a quadrilateral figure of which the opposite corner is indicated by Denebola in the tail of Leo. Within this quadrilateral lies the marvelous Field of the Nebulae, a region where with adequate optical power one may find hundreds of these strange objects thronging together, a very storehouse of the germs of suns and worlds. Unfortunately, these nebulae are far beyond the reach of an opera-glass, but it is worth while to know where this curious region is, even if we can not behold the wonders it contains. The stars Omicron ([omicron]), Pi ([pi]), etc., forming a little group, mark the head of Virgo. The autumnal equinox, or the place where the sun crosses the equator of the heavens on his southerly journey about the 21st of September, is situated nearly between the stars [eta] and [beta] Virginis, a little below the line joining them, and somewhat nearer to [eta]. Both [eta] and [zeta] Virginis are almost exactly upon the equator of the heavens. The constellation Libra, lying between Virgo and Scorpio, does not contain much to attract our attention. Its two chief stars, [alpha] and [beta], may be readily recognized west of and above the head of Scorpio. The upper one of the two, [beta], has a singular greenish tint, and the lower one, [alpha], is a very pretty double for an opera-glass. The constellation of Libra appears to have been of later date than the other eleven members of the zodiacal circle. Its two chief stars at one time marked the extended claws of Scorpio, which were afterward cut off (perhaps the monster proved too horrible even for its inventors) to form Libra. As its name signifies, Libra represents a balance, and this fact seems to refer the invention of the constellation back to at least three hundred years before Christ, when the autumnal equinox occurred at the moment when the sun was just crossing the western border of the constellation. The equality of the days and nights at that season readily suggests the idea of a balance. Milton, in "Paradise Lost," suggests another origin for the constellation of the Balance in the account of Gabriel's discovery of Satan in paradise: