Show ROOSEVELT LT TO PRESS BUTTON FOR NEGROES Exposition of Progress of Raco to Be Ee Formally Opened in Chicago Chic Tonight CHICAGO Aug H. H PresIdent H.-PresIdent President Roosevelt Roose will r ill press preus a n button In the library of or his hla summer home homo at Oyster Ba Bay tonight at S o'clock and 1111 the tho signal will open orlen the I netro exposition ever cr hl held held i thc tho he Middle 1 Slates and Mississippi Valley Vaile a lit exposition which will T occupy occum tho the First armory armor until September lUh The exposition will w show the progress of or the negro race In this country rom from the abolition of ot slavery cry forty art years year ago leg Over O t twenty Stats and T Territories are aro |