Medical contributions to the study of evolution.

"Part I: Adaptation and disease". The Croonian Lectures delivered in June 1917. Includes "Adaptation in the bacteria and the evolution of the infectious diseases" and "Adaptation to disease-producing agencies in the higher animals."

"Part II: Heredity and adaptation." This is a collection of related papers previously published.

Digital facsimile from the Hathi Trust at this link.

(Thanks to Robert L. Chevalier for this reference.)