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G43

unchanged, no matter how the place be continuously distorted, provided that every identical moveable and distortable place which at one instant has a given dimensionality (that of a point, of a line, of a surface, or of a space,) retains the same dimensionality at every instant. These alone are purely geometrical characters, and are not physical in any narrower sense.

Beside the four dimensionalities of places in our Space,