“RECENTLY I observed a peculiar behavior of a film of bichromated gelatine after it had been exposed to the action of light for a short time and then immersed into an aqueous solution of picric acid or sodium picrate and dried. “Those parts of the gelatine film which have been exposed to light are found [...]comments
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Tag Archives: Knoxville TN
Community Christmas tree, Knoxville, TN. On Market Street between Union Avenue and Clinch Avenue. Night view. Ordered by Knoxville Community Service Council. December 21, 1921. “Two unidentified women (initials M.H.P. and A.H.) in 1908 sent this Christmas greeting to Kentuckian Mary McDowell, “The manner of our growing old is the measure of our life.” Covered [...]comments