Free online Mexican newspaper searches and articles from 1722 to 1978

I'm guessing this site has been posted before but just case it hasn't:

Hemeroteca Nacional Digital de México
Page images and full-text search of nearly 600 titles ranging from 1722 to 1978. The URL is:
http://www.hndm.unam.mx/

I had to use google chrome to get it to work.