THE PRACTICAL
HOME PHYSICIAN AND ENCYCLOPEDIA OF MEDICINE The biggy of the late 1800's. Clearly shows the massive inroads in medical science and the treatment of disease.

ALCOHOL AND THE HUMAN BODY In fact alcohol was known to be a poison, and considered quite dangerous. Something modern medicine now agrees with. This was known circa 1907. A very impressive scientific book on the subject.

DISEASES OF THE SKIN is a massive book on skin diseases from 1914. Don't be feint hearted though, it's loaded with photos that I found disturbing.

Part of  SAVORY'S COMPENDIUM OF DOMESTIC MEDICINE:

 19th CENTURY HEALTH MEDICINES AND DRUGS