Page 455 - 89 history of astronomy_opt

All modern total solar eclipse observa-
tions seem to show that the shape of the
luminous corona surrounding the moon at
the moment of totality has a special dis-
tinct character during the time of a sun-
spot maximum, and another, totally differ-
ent, during a sun-spot minimum.
A suspicion is entertained that the to-
tal quantity of heat received by the earth
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