I entered and rang the bell, which was answered first by a Baskervillean baying, and in due course by Mrs Healey herself.

Someone get this hothead out of here.

The line drawn on the indicator diagram in the latter case has been named by Professor Rankine an Adiabatic line, because it is defined by the condition that heat is not allowed to pass through (διαβαίνειν) the vessel which confines the substance.

No doubt you are now acquiring the concept of a regular triskaidekahedron, or plane figure with thirteen equal sides, because I have just used the word.