Argument of B.R. Curtis, Esq., of Boston : in the case of Francis O.J. Smith, complain't, vs. Hugh Downing and als., respon'ts, in the Circuit Court of the U.S., Massachusetts District, Hon. Levi Woodbury, judge, presiding, for an infringement of the letters patent of Samuel F.B. Morse, for the electro magnetic telegraph, June 25 and 26, 1850.