Seitz, Frederick, University of Pennsylvania, from R.R.W., re radioactive mercury, use only protons, but with a beryllium target produce about 2000 curies radon beryllium equivalent of neutrons, interested in 43 minute Hg¹⁹⁷ or the 25 hour Hg^{203 or 205}, draft [als], n.d.

Seitz, Frederick, University of Pennsylvania, from R.R.W., re radioactive mercury, use only protons, but with a beryllium target produce about 2000 curies radon beryllium equivalent of neutrons, interested in 43 minute Hg197 or the 25 hour Hg203 or 205, draft [als], n.d., Box: 3, Folder: 102. Robert R. Wilson papers, 14-22-3093. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/224722 Accessed April 24, 2025.