Hinton - The Fourth Dimension.pdf

154
THE FOURTH DIMENSION
plane.
With regard to these squares severally, however,
different names must be used, determined by their
relations in the block.
Thus, in fig. 93, when the cube first rests against the
plane the null cube is in contact by its pink face; as the
block passes through we get an ochre section of the null
cube, but this is better called a yellow section, as it is
made by a plane perpendicular to the yellow line. When
p re v io u s lin e o f s u p p o rt
x
Fig. 94.
The cube swung round yellow line, with red line running from left
to right, and white line running down.
the null cube has passed through the plane, as it is
leaving it, we get again a pink face.
The same series of changes take place with the cube
appearances which follow on those of the null cube. In
this motion the yellow cube follows on the null cube, and
the square marked yellow in 2 in the plane will be first
“yellow pink face,” then “yellow yellow section,” then
“yellow pink face.”
In fig. 94, in which the cube is turned about the yellow
line, we have a certain difficulty, for the plane being will
find that the position his squares are to be placed in will
x