Propellers. - This is indeed the new era. Another propeller is to come out and add to the wealth of the Upper Lake craft. She will bear the name of Racine, in honor of one of the most flourishing towns on the Lake shore. She is being built at Oswego, and is to ply between Oswego and Chicago, in the regular line. She will be the handsomest propeller on the Lakes, and is to be commanded by an experienced and popular commander.
The introduction of the Ericsson propellers promises to work an early and entire revolution in the trade of the Great Lakes. They make their trips in about the same time that the best steamers did a few years since, and in half the time usually consumed by sail vessels under favorable circumstances. The expense of running them is but little more than that of sail vessels, and they carry freights at the same rates. - Milwaukee Sentinel.