[58] Kreislauf des Lebens, Brief. xviii.
[59] Dilthey, Ueber Einbildungskraft der Dichter, 1887.
[60] Lazzaretti, op. cit., 1880.
[61] Des Hallucinations, p. 30. Recent investigations in hypnotism show that the hallucination often has the character of real sensation; that, for example, visual suggestions may be modified by lenses. See my Nuove Studii sull’ ipnotismo.
[62] Studi Critici, Naples, 1880, p. 95.
[63] Souvenirs, p. 73, Paris, 1883.
[64] Confessions d’un Enfant du Siècle, pp. 218, 251.
[65] Introduction to Essai sur les Mœurs.
[66] Siècle de Louis XIV., 1.
[67] Dictionnaire Philosophique, art. Climat.