Editorial | Fenella France and Jennifer Wade, research chemists in the Librarys Preservation, Research and Testing Division point out detail on a map that can only be seen using the lab's hyperspectral imaging system. | Abby Brack Photojournalist

Fenella France and Jennifer Wade, research chemists in the Librarys Preservation, Research and Testing Division point out detail on a map that can only be seen using the lab's hyperspectral imaging system.

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