AMPLITUDE

(physics), the extent of a vibratory movement (e.g. wave or pendulum) measured from the mean position to an extreme; (math’s), angle determining the value of elliptic functions; (astron.), the complement of azimuth; also the are of the horizon between the magnetic west of east point and a heavenly body. WILLIAM AMPTHILL, LEOPOLD 18T RUSSELL BARON, (1829ODO 84), diplomatist; attaché to emba ies of Paris, Vienna, Constantinople; Sec. of Legation at Rome for twelve years; A istant Under-Sec. of State for Foreign Affairs (1870); late amba ador at Berlin; cr. Baron A. (1881).