(2) Moles Alvus, Plebs Alvus, Pallor Alvus, Mora Alvus, which would all enter on the left side of the Z axis.
Again, if the Block were turned round the X axis, the Syce side would enter, and the cubes appear in the following order:—
(1) Urna Syce, Moles Syce, Plebs Syce;
(2) Pallor Syce;
(3) Mora Syce.
Fig. 17.
Fig. 18.
A comparison of these three sets of appearances would give the plane-being a full account of the figure. It is that which can produce these various appearances.