. A complete geography. Fig. 286. To show that the suns rays passthrough more air when the sun islow in the heavens than when itis high. Explain the figure. 254 GENERAL GEOGRAPHY. Fig. 287. globe to see what countries are crossed by the Tropic of the sun seems to turn and move northward, and for thatreason this parallel is called a tropic (meaning to turyi). The position of the earth on March 21 corresponds to the thirdposition of the pencil, when the poles are again turned neithertoward nor away from the sun. The equator is once more underthe vertical rays of the sun, and the d
. A complete geography. Fig. 286. To show that the suns rays passthrough more air when the sun islow in the heavens than when itis high. Explain the figure. 254 GENERAL GEOGRAPHY. Fig. 287. globe to see what countries are crossed by the Tropic of the sun seems to turn and move northward, and for thatreason this parallel is called a tropic (meaning to turyi). The position of the earth on March 21 corresponds to the thirdposition of the pencil, when the poles are again turned neithertoward nor away from the sun. The equator is once more underthe vertical rays of the sun, and the days and nights are equal theworld over. This period, called the vernal equinox, is the com-mencement of our spring. After this date our days gradually lengthen until, on June 21, the con-tinued revolution of the earth hasbrought it into the fourth positionrepresented by the pencil (). The suns rays are thenvertical over the Tropic of Cancer(Fig. 287), and at this date oursummer begins. At noon of the21st of June the sun is directly Position of the earth June 21. Notice the ,i i i i> j_i i i vertical ray (middle heavy line) over the OVCr the heads ot the people wh
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