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to the child on the seashore applies to them
all. As each new discovery opens up, it
may be, boundless oceans for investigation,
for wonder, and for admiration, the great
astronomers, refusing to accept mere hy-
potheses as true, have founded upon these
discoveries a science as exact in its obser-
vation of facts as in theories. So it is that
these men, who have built up the most sure
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