27. For a full account of this experiment, see An Experimental Study of Visions, Brain, Winter Number, 1898; The Dissociation, pp. 81, 82.

28. The Dissociation, p. 77.

29. For numerous observations of this kind, see Pierre Janet: The Mental States of Hystericals.

30. The Mechanism and Interpretation of Dreams, loc. cit.

31. Loc. cit. See p. 51.

32. See Lecture VI, p. 185.

33. Gurney was among the first to demonstrate the induction of several states in the same subject. He was able to obtain three different hypnotic states (Proceedings S. P. R., Vol. IV, p. 515), and Mrs. Sidgwick and Miss Johnson eight in one individual, each with amnesia for the other. Janet, of course, demonstrated the same phenomena. In the cases of Miss B. and B. C. A. I obtained a large number of such states.

34. Morton Prince: The Dissociation, p. 55; also An Experimental Study of Visions, Brain, Winter Number, 1898.

35. Some of the Revelations of Hypnotism, Boston Medical and Surgical Journal, May 22, 1890.

36. Studien über Hysterie.

37. Of course I am not discussing here the genetic mechanism of the amnesia, being concerned only with the principle of conservation.

38. The Dissociation, pp. 284-5, 456-9.

39. Boris Sidis: The Psychology of Suggestion, p. 224; see also Multiple Personality, p. 143.

40. The Journal of Abnormal Psychology, Vol. II, p. 93.

41. The Dissociation, pp. 220, 221, 255, 531, 532.

42. The Dissociation, p. 83.

43. The Journal of Abnormal Psychology, Vol. I, No. 3.

44. American Journal of Insanity, July, 1910.