From their page:
The Lexington Public Library’s Digital Archives are intended to give open access to researchers and students to learn more about Fayette County and our rich history. This is not an exhaustive collection, though new material is continually being scanned and added. It is a very small fraction of the Library’s physical holdings, which are housed and available for reference in the Kentucky Room at the Central Library.
Be sure to visit: http://www.lexpublib.org/digital-archives