[1755] A 852 = B 880.
[1756] Cf. A 313 ff. = B 370 ff., above, pp. 498-9.
[1757] Cf. above, pp. xxviii-xxix.
[1758] Einleitung, § iv.: Abbott’s trans, pp. 17-23.
[1759] Supplementary to pp. xxv-xxxiii. Throughout I shall make use of my Studies in the Cartesian Philosophy, and may refer the reader to them for further justification of the positions adopted.
[1760] For recognition of this distinction, cf. Herbert Spencer, Principles of Psychology, vol. i., 3rd ed., pp. 620-3.
[1761] Cf. Studies in the Cartesian Philosophy, pp. 80-2, 106-7.
[1762] This distinction is due to Galileo, though the terms “primary” and “secondary” were first employed by Locke.
[1763] I have dealt with Avenarius’ criticism in “Avenarius’ Philosophy of Pure Experience” (Mind, vol. xv. N.S., pp. 13-31, 149-160); with Bergson’s criticism in “Subjectivism and Realism in Modern Philosophy” (Philosophical Review, vol. xvii. pp. 138-148); and with the general issue as a whole in “The Problem of Knowledge” (Journal of Philosophy, vol. ix. pp. 113-128).
[1764] On Descartes’ failure to distinguish between the mathematical and the dynamical aspects of motion, cf. above, p. 584.