O's Clock D's D's >'s h's 24's d's Q's છું' D longitude. declin. bef. O longit. latit. declin. longit. longit. longit|longit. longit. Om 8 6 9 8 n32 0 31738 2 n 3713s 420 2 9 4 15 8 11 Oaft16 247 1 20 9 7 154 14 30 2717 447 15 20 8 2 3518 0 Os 4 4 49/20 92 315 1115 4/28 31 5 53 38 29 45 6 56 43 4 n 33 20 's Clock D's M 612 17 4 30 Q's D longitude. declin. aft. O longit. latit. declin. longit. longit. longit. longit. longit. 17 23 21 2s 5610 12345 8 22 24 3 1910 10 520 255 436 6245 13 5 24 3 35 5 50 5 R39 50 2 022 17/23 0 24 D's D's h's 2's ♂'s 4310 611 21 25 14 M O's Clock D's 2 9 10 52 14 3416 15 21127 4 5915 Ο 10 11 014 5316 1616 48 5 D's D's h's 2's ♂'s Q's 's D longitude. declin. aft. O longit. latit. declin. lonsit. longit. longit. lougit. longit. 1m 8 10 4614 s 15 16 1418842 4 s 33 13 n 223133 610 2428 13m23 2728 1114 3829 6 53 23 38 6 8 25 617 43 23 44 6 625 1216 DECEMBER 1811. M Placeof D's h's d's Q's 'sh's D '89's 's node. latit. latit.latit. latit. latit. declin. declin, declin. declin. declin. EXCEPTING the rotation of the Earth upon its axis, there is, as far as we know, no other body in nature, with which we are acquainted, whose motion is perfectly uniform and regular. The apparent motion of the Sun is very unequal, and therefore equal or true time, which flows on for ever in the same manner, cannot be truly measured by the Sun's apparent motion. Equal and true time is that which is shown by a well-regulated time-keeper, as a clock or watch; and in order that the apparent time, shewn by the sun-dial, may be made to agree with this, it must be corrected by proper equations, such as we have given in each of our astronomical portions, and an account of which we shall now endeavour to explain. The difference between mean and apparent time depends chiefly on two causes, viz. 1. The obliquity of the ecliptic with respect to the equator; and, 2. The unequal motion of the Earth in its elliptical orbit. Since the Earth's equator, any equal axis is perpendicular to the plane of the OTHER BIBL |