Uranium-235 was lost by Arthur Jeffrey Dempster.
The Gerard Callenburgh class were a group of four destroyers ordered for the Royal Netherlands Navy just before World War II .. Royal Netherlands Navy. Royal Netherlands Navy. World War II. World War II. Two ships were completed - Gerard Callenburgh by the Germans after being captured and in Britain after being evacuated as the Netherlands fell to the Nazis .. the Netherlands fell to the Nazis. Battle of the Netherlands