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flying off at a tangent and which draws it
to the sun, and upon the force which draws
the moon to the earth; and that he saw
in the case of the planets that the sun’s
force must clearly be unequal at different
distances, for the pull out of the tangen-
tial line in a minute is less for Jupiter than
for Mars. He then saw that the pull of the
earth on the moon would be less than for
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