. . . . . . . . "Electronic books"@en . . "Letter from the Secretary of the Treasury transmitting a report of the director of the mint, of assays made of several species of foreign gold and silver coins, pursuant to the act of April 29, 1816"@en . . . "Letter from the Secretary of the Treasury transmitting a report of the director of the mint, of assays made of several species of foreign gold and silver coins, pursuant to the act of April 29, 1816" . . .