First edition. Paul Tannery (1843-1904) was a French mathematician, philosopher, and historian of science, particularly recognized for his work on the history of Greek science. His book Pour l'histoire de la science hellène. De Thalès à Empédocle (For the History of Hellenic Science. From Thales to Empedocles) is a fundamental study of Presocratic philosophy and the emergence of scientific thought in ancient Greece. Tannery explores the origins of mathematical and physical concepts among the early Greek thinkers, offering a valuable perspective on the genesis of Western science. This book is a reference for historians of science and ancient philosophy.