Diameter in Surface in Cubic Contents Geographical Geographical in Geographical Names. Miles. Square Miles. Cubic Miles. SUN, 194,000 118,093,000,000 3,825,903,253,970,000 Mercury, 608 1,161,314 117,659,099 Venus, 1678 8,844,063 2,473,469,743 Earth, 1719 9,282,066 2,659,159,061 Mars, 1006 3,178,805 532,996,317 Vesta, 74 15,000 2,121,347 Juno, 309 282,690 2,355,750 Ceres, 352 389,182 22,832,034 Pallas, 465 650,266 52,886,472 Jupiter, 19566 1,202,280,406 23,533,143,597,631 Saturn, 17263 936,530,620 2,757,547,946,775 Herschel, 7564 173,696,911 1,359,227,438,858 Moon, 480 723,686 51,561,578 TABLE II. _Showing the exact Duration of the Revolutions of the different Planets round the Sun._ Duration of the Planets. Years. Days. Hours. Min. Sec. Moon’s revolution round the Earth. Mercury, — 87 23 15 44 27 days, 7 hours, 43 Venus, — 224 16 49 10 minutes, and 12 Earth, 1 — 6 9 8 seconds. Mars, 1 321 22 18 31 Vesta, 3 225 — — — Juno, 4 131 10 30 — Ceres, 4 220 13 4 — Pallas, 4 221 15 35 — Jupiter, 11 314 20 39 — Saturn, 29 166 2 — — Herschel, 83 266 9 — — TABLE III. _Showing the Extent and Population of the five great Continents._ Names of the Continents. Extent in Sq. Miles. Population. America, 14,868,000 40,000,000 Europe, 3,292,000 198,000,000 Asia, 15,000,000 500,000,000 Africa, 11,267,900 150,000,000 Australia, 3,823,200 1,500,000 The United States, 1,781,926 13,000,000 POPULAR LESSONS IN ASTRONOMY, ON A NEW PLAN; IN WHICH SOME OF THE LEADING PRINCIPLES OF THE SCIENCE ARE ILLUSTRATED BY ACTUAL COMPARISONS, INDEPENDENT OF THE USE OF NUMBERS. BY FRANCIS J. GRUND, AUTHOR OF “AN ELEMENTARY TREATISE ON PLANE AND SOLID GEOMETRY,” “ELEMENTS OF NATURAL PHILOSOPHY AND CHEMISTRY,” &c. &c. BOSTON: CARTER, HENDEE, AND CO. 1833.