32 DAVID I. MACHT AND SHACHNE ISAACS 



(7) KRAEPELIN: Cited by Wundt, Physiol. Psychol., 1903, iii, 446. 



(8) MACHT: Journ. Pharmacol. and Exper. Therap., 1915, vii, 339. 



(9) MACHT, HERMAN AND LEVY: Proc. Natl. Acad. of Sciences, 1915, i, 582; 



and Journ. Pharmacol. and Exper. Therap., 1915, viii, 1. 



(10) DUNLAP: Jour, Exp. Psychol. 1917, ii, June. 



(11) DUNLAP: Psychological Review, 1913, xx, 154. 



(12) MUNSTERBERQ: Beitrage 2, Exp. Psychol. 1892, iv, 121, 



(13) MACHT: Trans. Assoc. of American Physicians, 1916. 



