above in chapter 31. Nevertheless, her highly perfected nervous and cerebral system was transmitted to the son, in whose case a father with a lively and passionate disposition and an energetic action of the heart was added, and thus the other physical condition of great mental power first appeared here. Perhaps this was Byron's case, since we nowhere find the mental advantages of his mother mentioned. The same explanation is also to be applied to the case in which the mother of a son of genius who was herself distinguished for mental gifts had a mother who was by no means clever, for the father of the latter has been a man of a phlegmatic disposition.
The inharmonious, disproportionate, ambiguous element in the character of most men might perhaps be referred to the fact that the individual has not a simple origin, but derives the will from the father and the intellect from the mother. The more heterogeneous and ill-adapted to each other the two parents were, the greater will that want of harmony, that inner variance, be. While some excel through their heart and others through their head, there are still others whose excellence lies in a certain harmony and unity of the whole nature, which arises from the fact that in them heart and head are so thoroughly adapted that they mutually support and advance each other; which leads us to assume that the parents were peculiarly suited to each other, and agreed in an exceptional measure.
With reference to the physiological side of the theory set forth, I wish now to mention that Burdach, who erroneously assumes that the same psychical qualities may be inherited now from the father, now from the mother, yet adds (Physiologie als Erfahrungswissenschaft, vol. i. § 306): "As a whole, the male element has more influence in determining the irritable life, and the female element, on the other hand, has more influence on the sensibility." What Linné says in the "Systema naturæ," Tom. i. p. 8, is also in point here: "Mater prolifera promit, ante genera-
