paternal example and instruction, the necessary introduction into the art to which they were exclusively destined. This secret and mysterious power which seems to guide the individual life I have made the subject of special investigations, which I have communicated in the essay, "Ueber die scheinbare Absichtlichkeit im Schicksale des Einzelnen" (Parerga, vol. i.). It is further to be observed here that there are certain scientific occupations which certainly presuppose good native faculties, yet not those which are really rare and extraordinary; while the principal requirements are zealous efforts, diligence, patience, early instruction, sustained study, and much practice. From this, and not from the inheritance of the intellect of the father, the fact is to be explained that, since the son always willingly follows the path that has been opened up by the father, and almost all businesses are hereditary in certain families, in some sciences also, which before everything demand diligence and persistence, individual families can show a succession of men of merit; such are the Scaligers, the Bernouillis, the Cassinis, the Herschels.
The number of proofs of the actual inheritance of the intellect of the mother would be much greater than it appears if it were not that the character and disposition of the female sex is such that women rarely give public proof of their mental faculties; and therefore these do not become historical, and thus known to posterity. Besides, on account of the weaker nature in general of the female sex, these faculties themselves can never reach the grade in them to which they may afterwards rise in the son; thus, with reference to themselves, we have to estimate their achievements higher in this proportion. Accordingly in the first instance, only the following examples present themselves as proofs of our truth. Joseph II. was the son of Maria Theresia. Cardanus says in the third chapter, "De vita propria:" "Mater mea fuit memoria et ingenio pollens." J. J. Rousseau says in the first book of the "Confessions:" "La beauté de ma mère, son
