The Foatniaster-Geiioral lias perfeotett arrangement for a ecntennial postofftoe at Philadelphia next year, whieh, for completcucss of detail, shall dazzáe the representativos of the " effeto nionarchies of Europe" as they have never been dazzied before. The amount of money appropriated for the purpose of allowing the l'ostoffice Department to make a display at the centomiial was very small. This trouble, however, has boen obviated by making the centeunial postoilice a station of the main office in Philadeiphia, fchus giving a chance at the regular appropriatioiiM to pay its expenses. The object of this centennial postoflice is to fnruish mail facilities for the small army of exhibitors and their subordínate, as well as the thovisands of visitors attendant npon the exhibition, who would not desire to go away down to the main office for their mail. The clerks employed in this office will be made up of the different nationalities reprosented at the centennial, so that everybenightcd foreigner will iind a fellow countryman, or one who can speak his language, in tliis cosmopolitan postoflice.