Page:Russell, Whitehead - Principia Mathematica, vol. II, 1912.djvu/9

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PRINCIPIA MATHEMATICA

                                 BY 
                ALFRED NORTH WHITEHEAD, Sc.D., F.R.S. 
      Fellow and late Lecturer of Trinity College, Cambridge

AND

                  BERTRAND RUSSELL, M.A., F.R.S. 
      Lecturer and late Fellow of Trinity College, Cambridge

                              VOLUME II

                              Cambridge 
                       at the University Press
                                1912