The Postmaster General Las sent the following circular to the postulasteis throughout the country : The following aection of a )aw bas been pansfid ly Congres and approvod by tho l'reKident : ■■Sjji;. 15. Tluit transic-nt nowapapera and m agazinfw, regular pujblicatione designert primnrilv for advertiBing pnirposê; or for fro circiilation at nominal ratea, and all printed matter of the ttiird olawi, exoept uusoalod eireiüara, ahail ! urlmittcd to aiul traiismitted' in tho mails, at tho rate of 1 oent for ovciy two ouucca, or fractioqa] nart thtreof ; aud ï cont for eaéh additionaJ twöouuoesorfraotionalpart t!ureof;and tho xeiider of any article of the third class of mail matter may writc his or ber uatue or addreag thereiu, or on the ootaido tliereof, with tlie word 'From' abovo or precedin tlie ame. or may write, brieflv, or print uu ;im uackago, tüo unmber aud namcH oí auy anieles incloed. I'ubliehera of uewspaper nd periodicats mny print on the wrappwt of iifewpaera or magazine sent from the oflico of pnblication to regular Hubseribers Uio timo to which anbneripüoa thcrefor bas been paid : and addreiises upon unaenlod circular may bo oitlior written, printed, or arlixed tbereto, at tlie option of tbo souder. "Sso. 16. That all acta or parta of acts iu coLll'ct with tho proviHiona of thia act ai'e hereby ropoaled." Ou unsealcd circulara, and all mailablo matter of the third elaaa, other than that deaiguated in the foregoirig section, postage will be charged a lieretoftiri' . I for oaeh ouuco or fraoJaies . Ttnee, Poatniiuster ■Oeucnil.