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taining a bit of wood and a slip of paper,
which had been presented to him by Sir
David Brewster. On the paper Sir David
had written these words: ”If there be any
truth in the story that Newton was led to
the theory of gravitation by the fall of an
apple, this bit of wood is probably a piece of
the apple tree from which Newton saw the
apple fall. When I was on a pilgrimage to
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