Transformation of wood into coal | University of Illinois Archives
Transformation of wood into coal
Photograph of a piece of wood displayed to show the transformation from wood into coal.
"Heat and extreme pressure incident to the driving of this pile transformed some of the carbon in the wood into coal."
Found in RS 39/2/20, Box 117 ENG 5-3, Folder "Civil Laboratory 1910-39".
Original Size: 15 x 20.5 cm.
University of Illinois Archives
39/2/20 Photographic Subject File, 1868-
Public Information Office, October 1965
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