The 19th layer of graphite covering layer 18 containing slugs of uranium oxide. Parts of the wooden scaffolding and surrounding balloon cloth also are visible.1990 viewsMar 14, 2026 at 01:13 PM
First pile scientists at the University of Chicago on December 2, 1946, the fourth anniversary of their success.2184 viewsMar 14, 2026 at 11:35 AM