You will see, as drawn on the chart, how the sun’s rays morning
and evening, summer and winter, are indicated streaming out in the
direction of the latitude arrows marked 40°. If you live on or near
any of the other degrees of latitude, indicated by the other arrows,
imagine the center of the sun slipped up or down to that point, and
then trace the rays lightly with a soft pencil across the chart in
lines parallel with the respective arrows.
[Illustration: “Home of Beauty,” Design 101, Rear View]
Of course, if you make any change, all four suns must be moved in a
corresponding way, for you will observe how beautifully symmetrical
the chart is. For any given northern latitude, the midsummer sun rises
and sets _north_ of due east and west at exactly corresponding points
on the eastern and western horizons, and these points in turn exactly
correspond, six months later, with those for midwinter day _south_ of
due east and west.
And this exact correspondence east and west, for the day, and north
and south, for the season, will obtain for any day in the year, or
for any place you take on the earth’s surface. Of course, it must be
noted that the time of rising and setting will change with every new
position taken. If you draw the midsummer sun down and the midwinter
sun correspondingly up until they coalesce at “E” and “W,” you have the
equinoxes about March 21st and September 21st, with the sun rising and
setting due east and west, and equal day and night in any part of the
world except the poles.
[Illustration: