Supplement to Principia Mathematica
Title page of the first edition of Principia Mathematica, Volume 1 (1910)
(This image appears courtesy of the Bertrand Russell Archives at McMaster University.)
The text is:
Alfred North Whitehead, Sc.D., F.R.S.
Fellow and late Lecturer of Trinity College, Cambridge
Bertrand Russell, M.A., F.R.S.
Lecturer and late Fellow of Trinity College, Cambridge
at the University Press