The author of a lexikographieblog found an article published in the late 19th century about the bad habit of placing full stops behind single words:
*Admire the normal round "s" and the German long "ſ" in the word "dieſes"
Ein beſorgter Unterthan (A caring citizen).
So far so good if it were not for an example seen during my recent trip. In Weimar at the Bauhaus University I took the following photo: