| Edward Payson Jackson - Astronomical geography - 1887 - 104 pages
...ecliptic? 2. Where would the tropics be if the axis were inclined 45° ? Where would the polar circles be? 3. How would the extremes of heat and cold compare...Where would the sun be seen at the winter solstice? EXERCISES FOR REVIEW. 1. Of what is the earth a part? 2. How large a part? 3. Prove that it is spherical.... | |
| Education - 1907 - 610 pages
...is making one revolution ? 10. What must be the approximate duration of twilight at the poles? 11. How much should the axis be inclined to bring the Tropic of Cancer to New York? 12. In which of the two States, Florida or Maine, will the growing crops of July or August receive... | |
| 1907 - 588 pages
...is making one revolution ? 10. What must be the approximate duration of twilight at the poles? 11. How much should the axis be inclined to bring the Tropic of Cancer to New York? 12. In which of the two States, Florida or Maine, will the growing crops of July or August receive... | |
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