T.H. HuxleyBritish biologist in full Thomas Henry Huxley

born May 4, 1825, Ealing, Middlesex, Eng. died June 29, 1895, Eastbourne, Sussex

T.H. Huxley, born above a butcher’s shop, was the youngest of the six surviving children of schoolmaster George Huxley and his wife, Rachel. Although Huxley received only two years (1833–35) of formal education at his father’s declining Ealing School, its evangelicalism later marked his scientific rhetoric. From 1835 his father tried managing a bank in his native Coventry, which left Huxley footloose in the ribbon-weaving city. Huxley’s parents were Anglicans (members of the Church of England), but the boy sympathized with the town’s Nonconformist (or Dissenting) weavers, who wanted religious equality and an end to the Anglicans’ control of public institutions. Fascinated by science and religion, he studied Unitarian works, whose cause-and-effect explanations and denial of the duality of spirit and matter challenged the socially conservative views dominant in natural history and natural theology. Thomas Carlyle’s books taught Huxley that the religious feeling of awe was distinct from theology, which dealt with gods and miraculous events. The teenager speculated (as did radical Dissenters) that morality was a cultural product, which left it open to a scientific explanation. These were the seeds of Huxley’s agnosticism, scientific enthusiasm, and understanding of sectarian power play.

The longhaired student was apprenticed (c. 1838–41) to his sister Ellen’s beer-swilling husband, John Charles Cooke, a medical materialist. Transferred to a London dockside practitioner early in 1841, Huxley was shaken by the lives of his pauper patients. Even at the back-street anatomy school where Huxley took the botany prize in 1842—Sydenham College, off Gower Street in London—there was no escaping sectarian politics and science; Sydenham’s owner, Marshall Hall, was studying mechanistic reflex arcs while haranguing the Royal College of Physicians for excluding Dissenters from its fellowship.

On a free scholarship (1842–45) to Charing Cross Hospital, London, Huxley won medals in physiology and organic chemistry. His own mechanistic bent showed as he sought to explain living processes by physicochemical laws, and his superb microscopy was revealed in his discovery in 1845 of a new membrane, now known as Huxley’s layer, in the human hair sheath.