Szilard, Leo, Columbia University, to R.R.W., Princeton University, re caution that uranium may have become pyroforic [sic] and burst into flame if container is opened, requests receipt for metal [tls], 7/16/1941

Szilard, Leo, Columbia University, to R.R.W., Princeton University, re caution that uranium may have become pyroforic [sic] and burst into flame if container is opened, requests receipt for metal [tls], 7/16/1941, Box: 3, Folder: 138. Robert R. Wilson papers, 14-22-3093. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/225001 Accessed December 28, 2025.