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3When the sun enters into Scorpio at the setting of the Pleiades, he diminishes, in passing to the southern parts, the length of the days; and from Scorpio passing to a point near the thighs of Sagittarius, he makes a shorter diurnal circuit. Then beginning from the thighs of Sagittarius, which are in Capricornus, at the eighth part of the latter he makes the shortest course in the heavens. This time from the shortness of the days, is called Bruma (winter) and the days Brumales. From Capricornus passing into Aquarius, the length of the days is increased to that of those when he was in Sagittarius. From Aquarius he passes into Pisces at the time that the west wind blows; and his course is equal to that he made in Scorpio. Thus the sun travelling through these signs at stated times, increases and diminishes the duration of the days and hours. I shall now treat of the other constellations on the right and left of the zodiac, as well those on the south as on the north side of the heavens.
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