Principia mathematica, vol. 2 (of 3), by Alfred North  Whitehead         78255

  [Author: Alfred North  Whitehead]

  [Author: Bertrand  Russell]

  [Link: https://www.gutenberg.org/ebooks/78255]

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Thanks to Richard Tonsing, Laura Natal and the Online Distributed

Proofreading Team at https://www.pgdp.net (This book was produced from

images made available by the HathiTrust Digital Library.) In memoriam of

Greg Newby.

Regards,

Robert