Note 0c — Introduction By Marcus Hartog, M.A., D.Sc., F.L.S., F.R.H.S.

The distinction was merely implicit in his published writings, but has been printed since his death from his “Notebooks,” New Quarterly Review, April, 1908. I had developed this thesis, without knowing of Butler’s explicit anticipation in an article then in the press: “Mechanism and Life,” Contemporary Review, May, 1908.