- § 416. The continuity of a projective space
- § 417. The continuity of metrical space
- § 418. An axiom of continuity enables us to dispense with the postulate of the circle
- § 419. Is space prior to points?
- § 420. Empirical premisses and induction
- § 421. There is no reason to desire our premisses to be self-evident
- § 422. Space is an aggregate of points, not a unity

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