There are several sites that offer online images of microfilmed issues of newspapers, particularly newspapers fifty or more years old.
My suggestion to most of these sites:
Do not post "hit and miss" issues of newspapers. While I realize that not all newspapers are extant, in several cases, a few issues for a month or a year are put online when more issues were microfilmed. I would rather see just the year of 1877 put online rather than a smattering off issues from 1877 through 1930. It makes searching more effective.
Just my opinion.