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Professor Simon Newcomb was expounding this to the New York
Mathematical Society only a month or so ago. You know how on a flat
surface, which has only two dimensions, we can represent a figure of
a three-dimensional solid, and similarly they think that by models
of three dimensions they could represent one of four--if they could
master the perspective of the thing. See?'
'
I think so,' murmured the Provincial Mayor; and, knitting his
brows, he lapsed into an introspective state, his lips moving as one
who repeats mystic words. 'Yes, I think I see it now,' he said after
some time, brightening in a quite transitory manner.
'Well, I do not mind telling you I have been at work upon this
geometry of Four Dimensions for some time. Some of my results
are curious. For instance, here is a portrait of a man at eight
years old, another at fifteen, another at seventeen, another at
twenty-three, and so on. All these are evidently sections, as it
were, Three-Dimensional representations of his Four-Dimensioned
being, which is a fixed and unalterable thing.
'Scientific people,' proceeded the Time Traveller, after the pause
required for the proper assimilation of this, 'know very well that
Time is only a kind of Space. Here is a popular scientific diagram,
a weather record. This line I trace with my finger shows the
movement of the barometer. Yesterday it was so high, yesterday night
it fell, then this morning it rose again, and so gently upward to
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