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Hinton - The Fourth Dimension.pdf

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CHAPTER XI<br />

NOMENCLATURE AND ANALOGIES PRELIM-<br />

INARY TO THE STUDY OF FOUR-DIMEN-<br />

SIONAL FIGURES<br />

IN the following pages a method of designating different<br />

regions of space by a systematic colour scheme has been<br />

adopted. <strong>The</strong> explanations have been given in such a<br />

manner as to involve no reference to models, the diagrams<br />

will be found sufficient. But to facilitate the study a<br />

description of a set of models is given in an appendix<br />

which the reader can either make for himself or obtain.<br />

If models are used the diagrams in Chapters XI. and XII.<br />

will form a guide sufficient to indicate their use. Cubes<br />

of the colours designated by the diagrams should be picked<br />

out and used to reinforce the diagrams. <strong>The</strong> reader,<br />

in the following description, should<br />

suppose that a board or wall<br />

stretches away from him, against<br />

which the figures are placed.<br />

Take a square, one of those<br />

x<br />

shown in Fig. 77 and give it a<br />

neutral colour, let this colour be<br />

called “null,” and be such that it<br />

Fig. 77.<br />

makes no appreciable difference<br />

Red<br />

Null<br />

Orange<br />

Yellow<br />

136

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