Pettengill, Amos, 1780-1830 · New-Haven, N. Whiting · leaf 22
alnumber is four. To illustrate the immediate cause of eclipses suspend aball to the Sun, and then move your hand round it so asto represent the revolution of the Moon round the Earth.When your hand passes directly between the ball andSun, the shadow will fall on the ball, and with respect toit the… … In this Fig.S is the Sun, m the Moon,E G the Earth, Pthe Earths Penumbra, «6a part of the Earths OrbitThe straight lines are the suns rays* Hote.—If the Moon be in or near its apogee, some of therays from F and C, will cross one another between her andjlhe Earth, and then the Eclipse of the Sun…
Astronomy, Juvenile and popular
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