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| View Original: | THC_2003.902.071_Urea_Plant.tif (1513x1217) | |||
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| Keywords: THC 2003.902.071 Urea Plant.tif Photograph unknown en Urea Plant for making Urea from Ammonium Carbamate Briquettes depicted people depicted place Fixed Nitrogen Research Laboratory ca 1920 1950 Print Photographic Original Negative in 5 4 Institution Chemical Heritage Foundation object history Travis Hignett Collection The images are from the United States Department of Agriculture U S D A Fixed Nitrogen Research Laboratory F N R L and date from the 1920s-1950s Many of the images are mounted on scrapbook pages and were originally in scrapbook albums exhibition history credit line Gift of Travis Hignett CHF Collections Image downloaded with permission from the Chemical Heritage Foundation as part of the Wikipedian in Residence initiative accession number 2003 902 071 http //www chemheritage org/ Chemical Heritage Foundation CHF-cooperation PD-USGov Images from the Chemical Heritage Foundation Images from the Travis Hignett Collection Fixed Nitrogen Research Laboratory Laboratories in the United States Ammonium compounds Urea | ||||