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More than 290 key metal scientists--or "conferees", as they are called-from 21 Marshall Plan and other free nations have been selected for tours by the State Department and the Economic Cooperation Administration. Individual teams of the visitors will visit more than 60 cities in 13 states, viewing at first hand American production and conservation methods in the metal industry. Tour itineraries are being arranged by the American Society for Metals and World Congress officials. The Study Tours will converge in Detroit for the World Metallurgical Congress, October 14-19, and the concurrently held 33rd National Metals Congress and Exposition, both A.S.M. sponsored projects. The Detroit affair will be the first world gathering of metal scientists and production chiefs and the largest industrial congress ever held anywhere. More than 40,000 persons are expected to register individually at the meeting. Members of the Tours will disembark in New York on September 13th and be welcomed to America at a Waldorf Astoria Hotel luncheon on September 17. They will visit essential industries along the Eastern seaboard en route to Washington where a meeting with President Truman on September 21 is anticipated. From there they will break into specialized groups for the tours across the nation. According to the spokesmen, special liaison representatives between the World Metallurgical Congress and various Government Departments have been appointed by Defense Mobilizer Charles E. Wilson, The E.C.A., State and Defense Departments and Charles Sawyer and Oscar L. Chapman, Secretaries of Commerce and Interior, respectively. One of the main purposes of the Congress and its Tours is "to advance metal production and conservation in the interest of national and free world defense." The Tours comprise 15 to 30 conferees per team and are organized according to interest: 1. Steel making and refining; 2. Rolling and manufacturing of copper, aluminum, magnesium and their alloys; 3. Metal fabrication; stamping, machining and finishing of alloys; 4. Heat treatment; 5. Welding and joining; 6. Inspection and testing; 7. A review of engineering and metallurgical education in the U. S. ; and 8. A research tour will visit Bell Telephone, U. S. Steel Corporation and Aluminum Company of America research foundation and laboratories, among others. Countries represented by conferees on the tours will be: Austria, Australia, Belgium, Brazil, Denmark, Finland, France, Germany, Greece, Holland, India, Italy, Japan, Luxembourg, Norway, New Zealand, Portugal, Sweden, Switzerland, Turkey and the United Kingdom. A quick and pure water supply for small bodies of isolated troops is assured with an Emergency Water Treatment Unit developed at the California Institute of Technology. In a recent demonstration at the A~r Force School of Aviation Medicine, the unit converted raw sewage with a bacteria count of 21 million per cc. into chemically pure and sterile water. Less than a cubic foot in size and weighing less than 12 pounds, the unit is operated by a simple hand pump; a strainer on an intake hose takes out algae, a chemical filter takes out suspended matter and kills bacteria. The unit will deliver pure water at the rate of two quarts per minute for 30 to 40 minutes, after which the filter must be replaced.