The fourth dimension

NOMENCLATURE AND ANALOGIES i598}

We must suppose the cubes turned round each of the axes, the red line, and the yellow line, then something, which was given as time before, will now be given as the plane creature’s space ; something, which was given as space before, will now be given as a time series as the cube is passed through the plane.

The three positions in which the cubes must be studied are the one given above and the two following ones. In each case the original null point which was nearest to us at first is marked by an asterisk. In figs. 93 and 94 the

Fig. 93,

The cube swung round the red line, so that the white line points towards us,

point marked with a star is the same in the cubes and in the plane view.

In fig. 93 the cube is swung round the red line so as to point towards us, and consequently the pink face comes next to the plane. As it passes through there are two varieties of appearance designated by the figures 1 and 2 in the plane. These appearances are named in the figure, and are determined by the order in which the cubes