Page:Description and Use of a New Celestial Planisphere.pdf/32

27 what point the Star is upon: Example, oberving the Stars in the Great Dogs hind part, above the Horizon, and having no compas, I refer to my watch, and find it 3 in the morning of the 15th of October, then rectify the Planisphere to the day and hour, and we find the Star in the Dogs flank, South-Eat by South, and that in the tail a quarter Eat; Aldebaran is on the Meridian, and the large Star in the Lion's tail, just riing on the Eat-North-Eat; thus, the points are gained by the Planisphere, without any other intrument, not only by land, but on the ea, between London and Holland, or in the Irih ea, or the Wetern Ocean to Newfoundland, or any other part, in or near this parallel, with ueful and pleaing effects both to the landman and mariner.

Problem 24. To find when the Sun ries or ets comically with any Star, uppoe the Great Dog, Sirius. Bring the center of the Star to the eatern Horizon; lay the director through the interection of the Horizon and the Ecliptic, and it points out the 11th of Augut for the day required; but to know when they et comically, or together, bring the Star to the wetern Horizon, and the director through the interection of the Ecliptic and the wetern Horizon, and it points out the 15th of May to be the day ought.

Problem 25. To find when the Sun ries or ets achronically, uppose with the right houlder of Orion. Bring the Star to the wetern Horizon, and lay the