...dark in reference to the cause of the intense cold of the glacial time. It has been suggested that the inclination of the earth's axis to the plane of its orbit, which is 23° 28', and is the cause of our present seasons, may have been so different during the glacial...

...extreme eccentricity of the orbit than when it is move nearly circular. The obliquity of the ecliptic, or the inclination of the earth's axis to the plane of its orbit, varies as has been said : at its maximum the polar regions would receive T^ more of heat than they...

...apsides.1 This line is not always directed to the same point in the heavens, but revolves ; and as the inclination of the earth's axis to the plane of its orbit may be considered fixed, the tendency of this movement is to bring about the seasons at all parts of...

...; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons. And was it thus with her uncle ? — he who was a...

...(Gray's Botanical Text-book). Three hours a week. 9 Seniors, 1 Junior. NATURAL HISTORY 1. 1. What is the inclination of the earth's axis to the plane of its orbit? If the inclination should become the same as that of Venus, what changes would lie produced in the...

...must in some cases turn farther eastward to overtake the Sun than in others; and, secondly, because of the inclination of the Earth's axis to the plane of its orbit. A mean solar day is the average length of all the solar days of the year. Of course, mean solar days...

...length? If they differ in length, where are they shortest, and why 1 2. What is the ecliptic ? 3. What is the inclination of the earth's axis to the plane of its orbit? 4. What are the different forms of government ? 5. What produces the changes of season, and why are...

...year from two causes : — 1. The inequality in the rate of the earth's motion round the sun ; — 2. The inclination of the earth's axis to the plane of its orbit. 307. As the earth does not always move at the same rate round the sun, it will, at different times,...

...independent of the direct calorific power of the solar rays, which modify climates, we may mention the inclination of the earth's axis to the plane of its orbit. This arrangement in nature gives rise to summer and winter, spring and autumn, in the temperate zones....

...of its Axis. — This fact of the unchanging inclination of its Earth's Axis FIG. 10. To illustrate the inclination of the earth's axis to the plane of its orbit. axis, as the earth revolves about the sun, may seem a small thing in itself ; but it is really of such...