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Below is a note by Russell published in the January 1919 issue of Mind (n.s., vol. 28, no. 119, p. 124). It is made in response to an article by C.D. Broad, “A General Notation for the Logic of Relations,” published in the July 1918 issue of Mind. The article by Russell referred to below as occurring in Peano’s journal Revue de Mathématiques, v. 7 can be found in English in Logic and Knowledge as “The Logic of Relations”. The article occurring in v. 8 can be found in English in v. 3 of The Collected Papers of Bertrand Russell as “The General Theory of Well-Ordered Series.”1
Mr. Broad’s interesting article in the July Mind on “A General Notation for the Logic of Relations” attributes to me (for what reason I cannot guess) a number of notations employed in Principia Mathematica. As far as my memory serves me, all these were invented by Dr. Whitehead, who, in fact, is responsible for most of the notation in that work. My original notation, before he came to my assistance, may be found in Peano’s Revue de Mathématiques, vols. vii and viii.
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