[77] See Wundt, Physiologische Psychologie, pp. 188-191.

[78] There is, indeed, sometimes an undertone of critical reflection, which is sufficient to produce a feeling of uncertainty and bewilderment, and in very rare cases to amount to a vague consciousness that the mental experience is a dream.

[79] Observations on Man, Part I. ch. iii, sec. 5.

[80] Quoted by Radestock, op. cit., p. 110.

[81] Le Sommeil et les Reves, p. 132, et seq.

[82] Das Leben des Traumes, p. 369.  Other instances are related by Beattie and Abercrombie.

[83] Le Sommeil et les Reves, p. 42, et seq.

[84] Beitraege sur Physiognosie und Heautognosie, p. 256.  For other cases see H. Meyer, Physiologie der Nervenfaser, p. 309; and Struempell, Die Natur und Entstehung der Traeume, p. 125.

[85] A very clear and full account of these organic sensations, or common sensations, has recently appeared from the pen of A. Horwicz in the Vierteljahrsschrift fuer wissenschaftliche Philosophie, iv.  Jahrgang 3tes Heft.

[86] Schopenhauer uses this hypothesis in order to account for the apparent reality of dream-illusions.  He thinks these internal sensations may be transformed by the “intuitive function” of the brain (by means of the “forms” of space, time, etc.) into quasi-realities, just as well as the subjective sensations of light, sound, etc., which arise in the organs of sense in the absence of external stimuli. (See Versuch ueber das Geisterschen:  Werke, vol. v. p. 244, et seq.)

[87] Das Alpdruecken, pp. 8, 9, 27.

[88] It is this fact which justifies writers in assigning a prognostic character to dreams.

[89] A part of the apparent exaggeration in our dream-experiences may be retrospective, and due to the effect of the impression of wonder which they leave behind them. (See Struempell, Die Natur und Entstehung der Traeume.)

[90] Cf. Radestock, op. cit., pp. 131, 132.

[91] I was on one occasion able to observe this process going on in the transition from waking to sleeping.  I partly fell asleep when suffering from toothache.  Instantly the successive throbs of pain transformed themselves into a sequence of visible movements, which I can only vaguely describe as the forward strides of some menacing adversary.

[92] Even the “unconscious impressions” of waking hours, that is to say, those impressions which are so fugitive as to leave no psychical trace behind, may thus rise into the clear light of consciousness during sleep.  Maury relates a curious dream of his own, in which there appeared a figure that seemed quite strange to him, though he afterwards found that he must have been in the habit of meeting the original in a street through which he was accustomed to walk (loc. cit., p. 124).