[6] Abstract of a paper read before the New York Academy of Sciences.
[7] Trans. Am. Med. Ass'n, 1880.
[8] In fœtal syphilis it is assumed that the spermatozoa may be the carriers of the disease; but no microscropist has yet described a separate species of spermatozoon for such cases.
[9] "The Philosophy of Mystery," London, 1841; cited by Hammond in his work on "Insanity."
[10] See articles by Dr. Hammond in this journal for 1865 and in the "Journal of Psychological Medicine" for 1869, also his "Sleep and its Derangements," Philadelphia, 1872, and his "Treatise on Insanity," New York, 1883.
[11] Yung, "Le sommeil normal et pathologique," Paris, 1883.
[12] "Leçons sur l'appareil vaso-moteur," t. ii., p. 154.
[13] "Principles of Psychology," vol. i., pp. 88, 89.
[14] "Les causes du sommeil," "Revue scientifique," t. xix.
[15] Yung, op. cit.