 | William Latham Bevan - Geography - 1884 - 718 pages
...taking into consideration the position, or rather the posture, of the earth in reference to the -mi. The axis of the earth is not perpendicular to the plane of its orbit, but inclined towards it at an angle of about 23J degrees (exactly 23° 27' 28-75"), as shown in Fig.... | |
 | James Monteith - Geography - 1895 - 176 pages
...geography, mark the position of the sun's rays, at certain times. They are called astronomical circles. 39. The axis of the earth is not perpendicular to the plane of its orbit, but is inclined 23$ degrees from the perpendicular.* Therefore, when the North Pole leans toward the... | |
 | Paul Belloni Du Chaillu - Adventure stories - 1899 - 356 pages
...revolution about the sun, is, so to speak, a flattened circle, somewhat elongated, called an ellipse. The axis of the earth is not perpendicular to the plane of the orbit, which is an imaginary flat surface enclosed by the line of the earth's revolution, but is... | |
 | Success - 1902 - 502 pages
...on its axis once in twenty-four hours, but it also travels around the sun once a year; and because the axis of the earth is not perpendicular to the plane of its orbit around the sun, the earth seems to rock back and forth in the direction of its axis once a year. This... | |
 | Grove Karl Gilbert, Albert Perry Brigham - Physical geography - 1902 - 444 pages
...when we forget the motion of a swift, smoothly running train until we look through the window. 19. The axis of the earth is not perpendicular to the plane of its orbit.—If it were, the equator would lie in the plane of the orbit, or, in other words, the plane... | |
 | Jules Grossmann, Hermann Grossmann, James Allan - Clocks and watches - 1905 - 528 pages
...translation is slowest. Another cause which still increases this irregularity is due to the fact that the axis of the earth is not perpendicular to the plane of the orbit that it traverses around the sun (plane of the ecliptic). The length of the solar day can... | |
 | Anna Botsford Comstock - Nature study - 1911 - 970 pages
...Furthermore, the fact that the path of the earth about the sun is not a circle but an ellipse, and that the axis of the earth is not perpendicular to the plane of its orbit, result in an unequal distribution of heat over the surface. It is always warmer near the equator than... | |
 | William Norman Thomas - History - 1920 - 554 pages
...direction from west to east, and the periodic time of a complete revolution is one year. But the polar axis of the earth is not perpendicular to the plane of its orbit round the sun ; it is inclined to the normal at an angle of about 23°-27'. Consequently, the apparent... | |
 | 606 pages
...somewhat difficult of explanation in a short article ; but the cause is to be found in the fact that the axis of the earth is not perpendicular to the plane of its orbit, or, in other words, it makes an angle ; and the consequence is that, in pursuing its path round the... | |
 | Anna Botsford Comstock - Education - 1939 - 916 pages
...Furthermore, the facts that the path of the earth about the sun is not a circle but an ellipse, and that the axis of the earth is not perpendicular to the plane of its orbit, result in an unequal distribution of heat over the surface. It is always warmer near the equator than... | |
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We shall now explain the variation of the seasons, and the difference of the length of the days and nights in those seasons — both effects resulting from the same cause. 
