A Mathematical Geography: With a Supplement Containing an Outline of Astronomy, and a Manual for the Stellar Tellurian, Designed for Common Schools

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Stellar Tellurian Mfg. Company, 1872 - Astronomical geography - 138 pages
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Page xii - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
Page xi - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the center.
Page 68 - How much should the axis be inclined to bring the Tropic of Cancer to New York?
Page xiii - The radius of a sphere, is a straight line drawn from the center to any point of the surface.
Page 59 - Preble, who on the 10th, at nine in the morning, proceeded with thirteen battoes, one-half the men on one side, and the other half on the other side of the river, and on Tuesday, the thirteenth, arrived at Norridgewalk, which is thirty-one miles above Teconnet, beautifully situated, near 400 acres of clear land, on which the grass is generally five or six feet high. Here they found six Indian men, three squaws and several children, who appeared at...
Page 66 - Therefore it is summer in the northern and winter in the southern hemisphere.
Page 54 - The common names, or meaning of these words, in the same order, are, the Ram, the Bull, the Twins, the Crab, the Lion, the Virgin, the Scales, the Scorpion, the Archer, the Goat, the Waterer, and the Fishes. Fig. 183. The 12 signs of the zodiac, together with the sun, and the earth revolving around him, are represented at fig.
Page xi - A radius of a circle is a straight line drawn from the center to the circumference.
Page 63 - ... examined, are now readily accounted for by the fact that the earth's axis of rotation neither coincides with the plane of the ecliptic nor is perpendicular to it, but is inclined under an angle, which is readily measured, and which is found to undergo a very slow change from century to century. In case the earth's axis were perpendicular to the plane of the ecliptic, then the illuminated hemisphere of the earth would always be bounded by a meridian circle, and every inhabitant of the earth would...
Page 81 - Every year whose number is not divisible by 4 without a remainder, consists of 365 days ; every year which is so divisible, but is not divisible by 100, of 366; every year divisible by 100 but not by 400, again of 365; and every year divisible by 400, of 366.

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