If you go to the Google News Archives and find a digitized back issue from the Google archives, you should be able to now browse that newspaper directly on Google.

For example, let’s take a look at the The News and Eastern Townships Advocate. I can then browse the newspaper by panning through the pages.

Here are some screen captures:

I spotted this addition via the Google News Help forum where Googler, Inbal replied to an old thread with this feature request. She said:

Indeed, very neat feature!

Forum discussion at Google News Help.