Wo have beforo published n notico of thia contomplated meeting of the Liberty Party of tha Northwest. We underetand that measures are taking to socurc a very full ottendance. Questionsofmuch importanco to this section of the country, and to the prosperity of the Liberty party, wil] come up for discuseion. Michigan, ouglit to bo fully represontcd. Wo may be permitted to say that the Liberty men of Michigan havo been negligent hitherto in uecuring a repre8cntntion in similar meetings. At tho National Convemioji at Buflalo n 1843, only one representativo appoarcd from Michigan; and at th lÃ¡re Cincinnali Convention last year, none, excopt Mr. Birney. Wo presume that a considerable riuinber from the western part of the State can bc pineut at Chicago without greut iucouvenieiico or cpciitÃo.