Geology Reference
In-Depth Information
F
IG
. 8.16
(
a
,
b
) Midsummer sunset, 1992, compared with prediction (Photos
by author, overlay by Richard Robertson)
track is higher and again the Sun's disc is displaced to the right.
The variation from theoretical values will be still more enhanced
by the relative pollution, and therefore higher than average den-
sity, of the air over the city.
Midsummer sunset that night provided another illustration
(Fig.
8.16
), and the explanation was confirmed by observations of
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