A tutor to astronomie and geographie, or, An easie and speedy way to know the use of both the globes, coelestial and terrestrial in six books : the first teaching the rudiments of astronomy and geography, the 2. shewing by the globes the solution of astronomical & geographical probl., the 3. shewing by the globes the solution of problems in navigation, the 4. shewing by the globes the solution of astrological problemes, the 5. shewing by the globes the solution of gnomonical problemes, the 6. shewing by the globes the solution of of [sic] spherical triangles : more fully and amply then hath ever been set forth either by Gemma Frisius, Metius, Hues, Wright, Blaew, or any others that have taught the use of the globes : and that so plainly and methodically that the meanest capacity may at first reading apprehend it, and with a little practise grow expert in these divine sciences / by Joseph Moxon ; whereunto is added Antient poetical stories of the stars, shewing reasons why the several shapes and forms are pictured on the coelestial globe, collected from Dr. Hood ; as also a Discourse of the antiquity, progress and augmentation of astronomie.

PROB. XXXII.

To find the Longitude and Latitude of the Stars, by the Coelestial Globe.

THe Quadrant of Altitude will reach but 90. degrees, as was said Prob. 9. Therefore if the Star you enquire after be on the North side the Ecliptick, you must elevate the North Pole 66½ degrees above the North side the Horizon: If on the South side the Ecliptick, you must elevate the South Nole 66½ degrees above the South side the Horizon: Then bring the Solsticial Colure to the Meridian on the North side the Horizon, and screw the Quadrant of altitude to the Zenith, which will be in 23½ degrees from the Pole of the World: So shall the Eclip∣tick ly in the Horizon, and the Pole of the Ecliptick also ly under the Center of the Quadrant of Altitude (as was

shewed Prob. 27.) Now to find the Longitude of any Star, do thus Turn the Quadrant of Altitude about till the graduated edge of it ly on the Star; and the degree in the Ecliptick that the Quadrant touches is the Longitude of that Star.

Example, for a Star on the North side the Ecliptick.

I would know the Longitude of Marchab, a bright Star in the wing of Pegasus: I find it on the North side the Ecliptick, Therefore I elevate the North Pole, and placing ♋ on the North side the Meridian, I screw the Quadrant of Altitude to the Zenith, as aforesaid: Then laying the edge of the Quadrant of Altitude upon that Star, I find that the end of it reaches in the Ecliptick to ♓ 18. 56. Therefore I say, the Longitude of Marchab is ♓. 18. 56.

For the Latitude of a Star.

The Degree of the Quadrant of Altitude that touches the Star is the Latitude of the Star.

Example.

The Globe and Quadrant posited as before, I find 19. deg. 26. min. (accounted upwards on the Quadrant) to touch Marchab aforesaid: Therefore I say, the Latitude of Marchab is 19. deg. 26. min.

And thus by elevating the South Pole and placing the Globe and Quadrant of Altitude as aforesaid, I shall find Canicula have 15. degrees 57. min. South Latitude, and 21. degr. 18. min in ♋, Longitude.