loose network of locally controlled marine hospitals, the Marine Hospital Fund, into a centrally controlled Marine Hospital Service, with its headquarters in Washington, D.C. This reorganization made the Marine Hospital Service into its own bureau within the Department of the Treasury. Dr. John Maynard Woodworth was subsequently appointed to the Service as "Supervising Surgeon." He transformed the service into a disciplined organization based on his experience in the Union Army as a surgeon. Dr. Woodworth required his physicians to be a mobile work force stationed where the service was in need, and he mandated the daily wear uniforms. This eventually led to the creation of the modern-day Public Health Service Commissioned Corps. Dr. Woodworth, using Army-style heraldry, created the Marine Hospital Service fouled anchor and caduceus seal which is used to this day by the Public Health Service. In 1873, Dr. Woodworth's title was changed to "Supervising Surgeon General," a forerunner of the modern-day office of Surgeon General of the United States. Woodworth created a cadre of mobile, career service physicians, who could be assigned as needed to the various Marine Hospitals. The commissioned officer corps was established by legislation in 1889, and signed by President Grover Cleveland. At first open only to physicians, over the course of the 20th century, the Corps expanded to include veterinarians, dentists, physician assistants, sanitary engineers, pharmacists, nurses, environmental health officers, scientists, and other types of health professionals. It is now known as the Commissioned Corps of the U.S. Public Health Service. Increasing scope The scope of activities of the Marine Hospital Service began to expand well beyond the care of merchant seamen in the closing decades of the nineteenth century, beginning with the control of infectious disease. Starting in the mid-14th century, ships entering harbors were quarantined when any of the crew was sick. This practice was normal procedure at United States harbors, with quarantine originally a function of the individual states, rather than of the Federal Government. The National Quarantine Act of 1878 vested quarantine authority to the Marine Hospital Service. However, the Public Health Act of 1879 created the National Board of Health, through which quarantine authority was shared with the U.S. Army and Navy; this arrangement was not reauthorized by Congress in 1883, and its powers reverted solely to the Marine Hospital Service. Over the next half a century, the Marine Hospital Service increasingly took over quarantine functions from individual