Latent and Cumulative Intoxication in Jules Héricourt’s Les Frontières de la Maladie (1904)

This article re-examines the French military physician and physiologist Jules Héricourt’s (1850–1938) treatment of what he termed intoxications d’origine externe, intoxications of external origin, in his popularising 1904 book Les Frontières de la Maladie: Maladies Latentes et Maladies Atténuées. Héricourt grouped alcohol, tea, coffee, tobacco, and carbon monoxide under a single clinical logic: each, in his account, produced disease gradually, cumulatively, and at exposure levels too low to be recognised as pathological. Through close, critical reading of the primary text, supplemented by biographical and historiographical contextualisation, this study asks how Héricourt characterised each form of intoxication, on what evidentiary basis, and what his synthesis contributes to the historiography of chronic toxic exposure. The analysis shows that most of Héricourt’s specific clinical claims lack a stated evidentiary basis and that several derive directly from earlier authors; his scientific authority rested chiefly on his experimental physiological work with Charles Richet rather than on documented clinical toxicology. The article argues that the book’s historiographical significance lies not in medical originality but in its role as a widely read popularisation of the idea that ordinary domestic and social habits could produce disease through prolonged, low-intensity, unrecognised exposure, an idea that resonates, at the level of general logic, with later models of chronic and cumulative toxic exposure. This resonance is treated as suggestive rather than as evidence of direct influence.