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Gas Apparatus Walworth Manufacturing Co.'s exhibit 1 silver albumen print; 26 x 21 cm. Mounted on backing board. Title on label: Gas apparatus. Exhibit title: Walworth Manufacturing Co., Boston, Mass., Exhibition #45, Machinery Hall, Bldg. #2. "Walworth Manuf The display, made of gas plumbing pipes and fixtures, with a display case in the middle showing plumbing fixtures and topped with American flags.