Progressive Convention for Brigliam. Special to Tho Tribune. BRIGHAM CITY, March fl. A mass convention of the Progressive party In Boxcldcr county will be held In this city next Tuesday, when It is proposed to perfect a county organization and to out-lino out-lino a campaign to wago during the summer preparatory to tho election next fall. Professor W. E. Cadmus, national organizer, will be present and will likely havo charge of tho meeting. Other prominent promi-nent Progressives will also be In attendance. at-tendance. Tho meeting has been called for 1 p. m, in the countj' court house.