§ 113 n. 1. F. 1901, § 2, Prop. 1 ·0. ↩

§ 115 n. 1. American Journal of Mathematics, Oct. 1902. ↩

§ 115 n. 2. Math. Annalen, Vol. XLVI, § 3. ↩

§ 116 n. 1. See Whitehead, loc. cit.. ↩

§ 116 n. 2. Loc. cit., § 4. ↩

The Principles of Mathematics was written by Bertrand Russell, and published in in 1903. It is now available in the Public Domain.