[228a] Kegan Paul & Co., 1883.
[228b] Principles of Psychology, Vol. I. p. 445.
[228c] Ibid. I. 456.
[228d] Problems of Life and Mind, first series, Vol. I., 3rd ed. 1874, p. 141, and Problem I. 21.
[228e] p. 33.
[228f] p. 77.
[228g] p. 115.
[229] Translation of Professor Hering’s address on “Memory as an Organised Function of Matter,” Unconscious Memory, p. 116.
[230] See Zoonomia, Vol. I. p. 484.
[231a] Problems of Life and Mind, I. pp. 239, 240: 1874.