United States admiral who led a naval expedition to Japan and signed a treaty in 1854 opening up trade relations between United States and Japan; brother of Oliver Hazard Perry (1794-1858)
United States commodore who led the fleet that defeated the British on Lake Erie during the War of 1812; brother of Matthew Calbraith Perry (1785-1819)
era trivalent metallic element of the rare earth group; occurs with yttrium
rea rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum