CREATE TABLE table_24507 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

Name the district for reason for change being died july 4, 1939
SELECT "District" FROM table_24507 WHERE "Reason for change" = 'Died July 4, 1939'
SELECT "District" FROM "table_24507" WHERE "Reason for change" = 'Died July 4, 1939'