219. That these accelerations of the immersions of Jupiter’s Satellites into his shadow, as the Earth approaches towards Jupiter, and the retardations of their emersions out of his shadow, as the Earth is going from him, are not occasioned by any inequality arising from the motions of the Satellites in excentric Orbits, is plain, because it affects them all alike, in whatever parts of their Orbits they are eclipsed. Besides, they go often round their Orbits every year, and their motions are no way commensurate to the Earth’s. Therefore, a Phenomenon not to be accounted for from the real motions of the Satellites, but so easily deducible from the Earth’s motion, and so answerable thereto, must be allowed to result from it. This affords one very good proof of the Earth’s annual motion. 220. TABLES for converting mean solar TIME into Degrees and Parts of the terrestrial EQUATOR; and also for converting Degrees and Parts of the EQUATOR into mean solar Time. +---------------------------------------------+ | TABLE I. For converting Time into | | Degrees and Parts of the Equator. | +-----+-------+-----+---------+-----+---------+ | | | *M. | D. M. | *M. | D. M. | |Hours|Degrees| S. | M. S. | S. | M. S. | | | | T. | S. T. | T. | S. T. | +-----+-------+-----+---------+-----+---------+ | 1 | 15 | 1 | 0 15 | 31 | 7 45 | | 2 | 30 | 2 | 0 30 | 32 | 8 0 | | 3 | 45 | 3 | 0 45 | 33 | 8 15 | | 4 | 60 | 4 | 1 0 | 34 | 8 30 | | 5 | 75 | 5 | 1 15 | 35 | 8 45 | +-----+-------+-----+---------+-----+---------+ | 6 | 90 | 6 | 1 30 | 36 | 9 0 | | 7 | 105 | 7 | 1 45 | 37 | 9 15 | | 8 | 120 | 8 | 2 0 | 38 | 9 30 | | 9 | 135 | 9 | 2 15 | 39 | 9 45 | | 10 | 150 | 10 | 2 30 | 40 | 10 0 | +-----+-------+-----+---------+-----+---------+ | 11 | 165 | 11 | 2 45 | 41 | 10 15 | | 12 | 180 | 12 | 3 0 | 42 | 10 30 | | 13 | 195 | 13 | 3 15 | 43 | 10 45 | | 14 | 210 | 14 | 3 30 | 44 | 11 0 | | 15 | 225 | 15 | 3 45 | 45 | 11 15 | +-----+-------+-----+---------+-----+---------+ | 16 | 240 | 16 | 4 0 | 46 | 11 30 | | 17 | 255 | 17 | 4 15 | 47 | 11 45 | | 18 | 270 | 18 | 4 30 | 48 | 12 0 | | 19 | 285 | 19 | 4 45 | 49 | 12 15 | | 20 | 300 | 20 | 5 0 | 50 | 12 30 | +-----+-------+-----+---------+-----+---------+ | 21 | 315 | 21 | 5 15 | 51 | 12 45 | | 22 | 330 | 22 | 5 30 | 52 | 13 0 | | 23 | 345 | 23 | 5 45 | 53 | 13 15 | | 24 | 360 | 24 | 6 0 | 54 | 13 30 | | 25 | 375 | 25 | 6 15 | 55 | 13 45 | +-----+-------+-----+---------+-----+---------+ | 26 | 390 | 26 | 6 30 | 56 | 14 0 | | 27 | 405 | 27 | 6 45 | 57 | 14 15 | | 28 | 420 | 28 | 7 0 | 58 | 14 30 |