To reconstruct the endocrine formula or equation of Nietzsche inductively, one should analyze first the information available concerning his parents and relatives. His grandfather was a conservative bourgeois of a superior type, who was the author of treatises designed to narcotize the forces of rebellion of his time. What he was like physically, no epitaph declares. His father was a clergyman. A description of him reads ... "tall and slender, with a noble and poetic personality, and a peculiar talent for music ... short-sighted." That ranks him at once as a pituito-centric. The mother was dark and had a fiery temper and came of a family distinguished for the powerfully built anatomy of its members. In the heredity of Nietzsche, the father appears therefore to supply a pituitary predominating element, the mother an adrenal-pituitary predominating element. Nietzsche himself worked strenuously at the intellectual life (after 20, when he probably stopped growing, and the brain tonic action of the ante-pituitary could manifest itself). Early distinction rewarded him with a professorship in philology at 24. One of Prussia's wars of conquest entangled him, and presented him with diphtheria. A friendship with Richard Wagner marked the turning point of his life, and the point of departure for his works on the most fundamental values of human life. Meanwhile, attacks of sick-headache of varying degrees of severity made him miserable periodically--they came about every two weeks and lasted two to three days--and left him wretched and exhausted. At last, at 44, a species of stroke terminated his sufferings, causing him to lose his speech and memory, and thenceforth there was progressive deterioration, physical and spiritual, with repeated attacks.