Last Updated：2022/12/24
For these complicated reasons, although, when the sun is vertical, and darts a perpendicular ray, it is supposed to strike with greatest force; yet, in those countries where it is vertical twice a year, in passing to and from the Tropic of Cancer, the greatest heat is not during the instant of its verticalities, but some weeks after, when it is returning from one Tropic to the other, and its rays oblique.
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For
these
complicated
reasons,
although,
when
the
sun
is
vertical,
and
darts
a
perpendicular
ray,
it
is
supposed
to
strike
with
greatest
force;
yet,
in
those
countries
where
it
is
vertical
twice
a
year,
in
passing
to
and
from
the
Tropic
of
Cancer,
the
greatest
heat
is
not
during
the
instant
of
its
verticalities,
but
some
weeks
after,
when
it
is
returning
from
one
Tropic
to
the
other,
and
its
rays
oblique.
