. The story of the exposition; being the official history of the international celebration held at San Francisco in 1915 to commemorate the discovery of the Pacific Ocean and the construction of the Panama Canal. coal mining machine, truck, and track jack. Pyrene Manufacturing Company, New York; fire extinguishers. Riverside Portland Cement Company, Los Angeles; cement for floor andwalls. Southern Wyoming Mine Operators Association, Cheyenne, Wyo.; RockyMountain coal mine scene. Sullivan Machinery Company, Spokane, Wash.; post puncher. Superior Oxygen Company, Pittsburgh, Pa.; oxygen for rescu
. The story of the exposition; being the official history of the international celebration held at San Francisco in 1915 to commemorate the discovery of the Pacific Ocean and the construction of the Panama Canal. coal mining machine, truck, and track jack. Pyrene Manufacturing Company, New York; fire extinguishers. Riverside Portland Cement Company, Los Angeles; cement for floor andwalls. Southern Wyoming Mine Operators Association, Cheyenne, Wyo.; RockyMountain coal mine scene. Sullivan Machinery Company, Spokane, Wash.; post puncher. Superior Oxygen Company, Pittsburgh, Pa.; oxygen for rescue demonstrations. United States Public Health Service, Washington, D. C; surgical equipmentand attendants. Utah Copper Company, Salt Lake City; motion pictures of surface mining,milling, and smelting. Western Electric Company, New York; mine telephone system and portablemine rescue telephone. Westinghouse Electric and Manufacturing Company, Pittsburgh, Pa.; storagebattery mine locomotive, trolley-gathering locomotive, motors for various pur-poses. Sirocco for ventilation. White Company, Cleveland, O.; mine-rescue auto truck. Worthington, Henry R., San Francisco; special vertical direct-connectedsump STAGING A MINE RESCUE
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Keywords: ., bookcentury1900, bookdecade1920, bookidstoryofexpos, bookyear1921
