This little book gives the substance of a popular lecture recently delivered at the Harvard Medical School. The language is non-technical so that it can easily be understood by the layman. Bright’s disease, otherwise known as nephritis, is a disease of the kidneys, due to inflammation or to bacterial invasion or to a degeneration or sclerosis of the small arteries of the kidney, with the resulting destruction of tissue. William Ohler, a well-known specialist on the subject, takes up such topics as kidney structure and functions, the urine, the scope of Bright’s disease, diet and dietary management, and treatment.