There is no great enterprise which tends to revolutionize the commercial channels of the world that has not its important sanitary aspects. Just at this time the Panama Canal seems a reasonable certainty in the not very distant future and the water route to Eastern Asia will be largely diverted from its present channels. The possibilities of this fact as regards health and sanitary matters are really serious and important.
In a discussion at the London Epidemiological Society, February 25, Dr. Patrick Manson took up this subject, calling attention to the diffusion of disease by insects, especially the mosquito as the intermediary host of the specific hematozoa, with special reference to the question of yellow fever as it concerns the Panama Canal. At the present time yellow fever is a disease confined particularly to the east coast of America and a part of the west coast of Africa, occasionally, however,