The Glands Regulating Personality / A Study of the Glands of Internal Secretion in Relation to the Types of Human Nature

The work traces the discovery and anatomy of internal secretion glands and explains how their chemical secretions form an interlocking endocrine network involving thyroid, pituitary, adrenals, gonads, and thymus. It describes how hormonal activity influences growth, metabolism, sexual differentiation, and physiological rhythms, and examines mechanisms by which glands shape body and behavior. The text then considers how endocrine variations correspond to temperaments and types of personality, presents historic exemplars for illustration, and discusses clinical applications and possible implications for human evolution, integrating physiological detail with psychological and social perspectives.