INTRODUCTION.

Importance of the study of special feelings—Utility of historical documents—Causes of the evolution of the feelings: (1) intellectual development; (2) hereditary influence, perhaps reducible to influences of environment—Cases in which the evolution of ideas precedes that of feelings—Inverse cases—The intellect swayed by the principle of contradiction; feeling by that of finality—Classification of primitive tendencies—Method to be followed—Group I.: physiological (reception, transformation, restitution)—Group II.: psycho-physiological—Group III.: psychological—Their enumeration.