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a black band–a fact which was placed be-
yond dispute by Herschel, who also found
that the thickness of the ring subtends an
˜
angle less than 0”.3. ShrAter estimated its
thickness at 500 miles.
Many speculations have been advanced
to explain the origin and constitution of the
ring. De Sejour said [6] that it was thrown
off from Saturn’s equator as a liquid ring,
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