Advertising postcard for St. Gobain, or Compagnie de Saint-Gobain, depicts a man pointing to a map of St. Gobain's chemical fertilizer plants located in France. Text underneath the map states "26 usines" or factories, which are highlighted in red on the map.
St. Gobain, a glass manufacturer, also produced chemical products used in the glass-making process including sulfuric acid, which is used in chemical fertilizers.
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“Engrais Chimiques Des Manufacture De St. Gobain.” Paris, France: Compagnie de Saint-Gobain, circa 1925. Robert J. Bauman collection. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/4j03d0584.
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