This evening, I was looking for online newspapers that might help me with a bit of research I'm doing on a composer by the name of A. S. Bowman (I'll blog about him soon) and I stumbled on a resource that might be of interest to those of you who have Polish ancestors in Chicago.
It looks as though the first ten years (1908-1917) of Dziennik Zwiazkowy, “Chicago’s largest and oldest Polish newspaper,” are available online for free.
The newspaper is part of the University of Illinois at Urbana-Champaign's Illinois Digital Newspaper Collection. Other titles include Barrington Review, Southern Illinois Journal, and several newspapers from Quincy.
For online newspapers from other states, check out Penn Libraries research guide titled Historical Newspapers Online. It's the web page that led me to the Illinois newspaper page.