The New York Times just released an amazing website: "Times Machine". You can browse every edition released between September 18, 1851, through December 30, 1922. The browser allows you to roll-over each article to facilitate reading.
The ad shown here appeared one hundred years ago today.
Update: the link no longer works. Either the NYT removed it from the internet already or you have to be a paid subscriber of the newspaper to access it. Sigh.