Originally published in 1874, these maps of the eastern half of the United States were designed to show the distribution of diseases including typhoid, malaria, pneumonia, tuberculosis, and rheumatism. The maps were published by one “L.H. Carney, M.D.,” but we have found no biographical data on the author. Medical data (in the form of statistics) is not shown and the maps are simply shaded to show the severity of infection.
An interesting link found among my daily reading