Recognized today largely for his contributions to chemistry and to the role of experiment in scientific investigation, Robert Boyle (1627-1691) wrote extensively on the causes of disease, the importance of dissection to medical education, and the use and preparation of drugs. In the first in-depth study of Boyle's medical writings, Barbara Beigun Kaplan argues that, in addition to his reputation in chemistry, Boyle deserves recognition for his strong medical interests.