William Osler, the “Father of Modern Medicine”, was a Canadian physician and one of the four founding professors of Johns Hopkins Hospital. His Principles and Practices of Medicine was the standard textbook in the field for over 40 years. This classic medical reference work is organized as follows: Section I. Specific Infectious Diseases A. Bacterial Diseases B. Non-Bacterial Fungus Infections—The Mycoses C. Protozoan Infections D. Diseases Due to Metazoan Parasites E. Infectious Diseases of Doubtful of Unknown Etiology Section II. Diseases Due to Physical Agents Section III. The Intoxications Section IV. Deficiency Diseases Section V. Diseases of Metabolism Section VI. Diseases of the Digestive System A. Diseases of the Mouth B. Diseases of the Salivary Glands C. Diseases of the Pharynx D. Diseases of the Tonsils E. Diseases of the Oesophagus F. Diseases of the Stomach G. Diseases of the Intestines H. Diseases of the Liver I. Diseases of the Pancreas J. Diseases of the Peritoneum K. Diseases of the Omentum Section VII. Diseases of the Respiratory System A. Diseases of the Nose B. Diseases of the Larynx C. Diseases of the Bronchi D. Diseases of the Lungs E. Diseases of the Pleura F. Diseases of the Diaphragm Section VIII. Diseases of the Kidneys Section IX. Diseases of the Blood-Forming Organs Section X. Diseases of the Circulatory System A. Diseases of the Pericardium B. Diseases of the Heart C. Diseases of the Arteries Section XI. Diseases of the Ductless Glands Section XII. Diseases of the Nervous System A. General Introduction B. System Diseases C. Hereditary and Familial Diseases D. Diseases of the Meninges E. Meningo-Myelo-Encephalitis F. Myelitis G. Diffuse Scleroses H. Diffuse and Focal Diseases of the Spinal Cord I. Diffuse and Focal Diseases of the Brain J. Diseases of the Peripheral Nerves K. General and Functional Diseases. L. Vaso-Motor and Trophic Diseases Section XIII. Diseases of the Locomotor System A. Diseases of the Muscles B. Diseases of the Joints C. Diseases of the Bones