Interesting M Gng. There will be a union meeting of all friendly to the cause ol <eameu, on Sunday, at :. o'clock P. M , :»t the Mechan ics 1 Institute, Tbe Broad Street Methodist congregation, now worshipping there, have kindly consented te the nse of the Hall on that occasion. All she mi ureters ol tbe city bave been invited and are expected to be present, and will no doubt u:\<- ibe cause their hearty