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rector through the interſection of the Ecliptic and the eaſtern Horizon, and it points to the 28th of November, for the day of Achronical riſing; but, if you bring the Star to riſe, and turn the director through the interſection of the Ecliptic and the weſtern Horizon, it points out the 8th of January to be the day on which the Sun ſets achronically with that Star.
Problem 26. To find what days of the year the Sun enters into each ſign of the Zodiac? Rule—Begin at Aries, and lay the director through it into the circle of months, and it cuts the 20th of March, when the Sun enters that ſign; then lay it through 0° of Taurus, and it points out the 20th of April; and ſo, whatever day is pointed to, when the director is laid through any point of the Ecliptic, that is the day in which the Sun will be in that ſign and degree,
Problem 27. To find what time of the year the Little Dog Star will be on the Meridian at eleven o'clock at night?—Turn the Index, till the Star is on the Meridian; then look for eleven at night, and it points to the 25th of January, for the day ſought; at which time, of the year, and hour of the night, we may ſee Procyon, Castor and Pollux, tranſit the ſouthern Meridian.
Problem 28. To find a true Meridian line by the preciſe time of the Tranſit of any Star found by the Planisphere, thus: Drop a perpendicular line between the eye and the Star down to any fixed object before
