This book investigates how the adoption of mechanical timekeeping devices, specifically sundials and water clocks, fundamentally altered the conceptualization and clinical practice of medicine in antiquity. Kassandra J. Miller, a scholar of ancient history and science, utilizes a multidisciplinary approach to examine the intersection of chronometry and medical theory. She argues that the shift toward precise temporal measurement did not merely improve clinical accuracy but reshaped the philosophical framework through which ancient practitioners understood health, disease, and the human body. By analyzing medical texts alongside archaeological evidence of timekeeping instruments, the author demonstrates a reciprocal influence between medical innovation and broader societal engagement with time.

Scholars in the history of science recognize this work as a specialized contribution to the study of ancient technology and medical epistemology. Readers frequently note the academic density of the prose, which is tailored for researchers and students of classical history.