An index of differential diagnosis of main symptoms by various writers

First published in 1912 by Macmillan and edited by Herbert French, this landmark medical reference was conceived to shift the diagnostic focus from specific diseases to the systematic analysis of clinical symptoms. In an era when medical practitioners often struggled to reconcile diverse patient presentations with a definitive diagnosis, French sought to provide a comprehensive guide that allowed physicians to work backward from what the patient reported to the underlying pathology. The work was organized alphabetically by symptom, a revolutionary approach at the time that made it an essential bedside companion for general practitioners.

The text was notable for its collaborative nature, drawing on the specialized expertise of various writers across the medical field to ensure a rigorous standard of clinical accuracy. Its design favored utility and clarity, establishing a template for medical indexing that would influence professional literature for decades. The book was received with significant acclaim by the medical community for its pragmatism and depth, eventually going through numerous editions that cemented its status as a foundational text in the history of clinical medicine.