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28 through the interection of the Ecliptic and the eatern Horizon, and it points to the 28th of November, for the day of Achronical riing; but, if you bring the Star to rie, and turn the director through the interection of the Ecliptic and the wetern Horizon, it points out the 8th of January to be the day on which the Sun ets achronically with that Star.

Problem 26. To find what days of the year the Sun enters into each ign 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 ign; then lay it through 0° of Taurus, and it points out the 20th of April; and o, 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 ign 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 ought; at which time, of the year, and hour of the night, we may ee Procyon, Castor and Pollux, tranit the outhern Meridian.

Problem 28. To find a true Meridian line by the precie time of the Tranit of any Star found by the Planisphere, thus: Drop a perpendicular line between the eye and the Star down to any fixed object before