A copy of a docu-meut. signed aud certified as a true copy by the oflicer to whose custody the original is intrusted. Doremus v. Smith, 4 N. J. Law, 143; People v. Foster. 27 Misc. Rep. 576. 58 N. Y. Supp. 574; Nelson v. Blakey, 54 Ind. 36