A study from 1934 on how kids used the typewriter, and how it changed the classrom. Source. h/t: Marcin Wichary, whose forthcoming book about keyboards might interest you.
Russian typewriter art from the 1930′s made by Elena Rebinder, who was married with the famous chemist Piotr Rebinder. Scanned by Prozhito. h/t: Gleb Albert.
Written graphics from 1892. First two by T.F. Adams, the next one by Frank Baunelle, and the final one by an unknown artist. via James Ryan.
Typewriter art by Frederick Carles, 1895. Forgotten pioneer work found by James Ryan.