An easy introduction to astronomy for young gentlemen and ladies : describing the figure motions, and dimensions of the earth : the different seasons : gravity and light : the solar system : the transit of Venus and its use in astronomy : the moon's motion and phases : the eclipses of the sun and moon : the cause of the ebbing and flowing of the sea, &c. (1812)
Ferguson, James, 1710-1776 · Philadelphia : Johnson and Warner, Ann Cochran, printer · leaf 120
Cray & Todd se. … 101 Now, suppose a great circle P u I p x, to bedrawn round the Earth, through its North pole Pand its South pole/?; and let ^ be the Equator. Divide the great circle P u Ip x into 360 equalparts or degrees: and set off 23i of these degreesfrom P to U. Then at the distance P u from theNorth pole,…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
