[1215] W. i. pp. 87-92.
[1216] Grundsätze der reinen Erkenntniss-Theorie, p. 151. Quoted and translated by Caird, i. p. 572. Caird sums up the matter in a sentence (p. 571): “Kant is showing, not that objective succession is always causal, but that the determination of a succession of perceptions as referring to a succession of states in an object, involves the principle of causality.”
[1217] Loc. cit.
[1218] The connected question how we can determine the ball and the cushion as objectively coexistent is the problem of the third Analogy.
[1219] III. Erklärung 1 and 2, Lehrsatz 1 (especially Anmerkung thereto). Cf. also II. Erklärung 1 and 5, and the last pages of the Allgemeine Anmerkung.
[1220] Pp. 351, 373-4. Cf. pp. 318-21.
[1221] A 170-1 = B 212-13, above, p. 353, n. 2.
[1222] A 208 = B 253-4.
[1223] Metaphysical First Principles, II. Lehrsatz 4, Anmerkung 2.
[1224] A 209-10 = B 255-6.