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Radiography has for many years been the principal method for the non-destructive testing and inspection of materials of industry in their varied stages of production from the initial raw state to the: finished product. The finished products so tested are literally limitless in their variety—weldments, castings, and combinations of these in all of the metals and alloys. In addition, a considerable amount of assembled objects, partially metallic and partially nonmetallic such as glass, rubber, and plastics, is radiographically tested for detection of jointure flaws, or for alignment, or both.
Head, North American Philips Co., Inc., Mt. Vernon, N. Y.
Head Metallurgist, Material Laboratory, New York Naval Shipyard, Brooklyn, N. Y.