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TROPIC OF CANCER

H'

S

EQUATOR

IX

TROPIC OF CAPRICORN

half in the light.

15

ANTARCTIC CIRCLE

approach the south pole.

Direction of SUN'S CENTRE and LINE in PLANE of EARTH'S ORBIT

Fig. 1, showing one half of the earth in the dark,iand remaining Also the increasing length of day as we

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The Practical teacher; with which

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APRICORN

C CIRCLE

Tig. 2, the earth six months after the mist position. Hence, or the opposite side of the sun; the axis, however, is seen to point in

in Fig

The days

increase i

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