perpendicularity

In the conscious reasoning of both, however, is the condition of perpendicularity.

The symmetry of perpendicularity is a particular instance of the symmetry of the mutual relations between two time-systems.

In this way we have pointed out unique and definite properties in nature which correspond to perpendicularity.

The old hands take a sidelong view with one eye closed to test the perpendicularity of the stacks.

Of new definitions we mention those which relate to the perpendicularity and the inclination of lines and planes.