Since my blog post on scanned fingers in Google books to question the medium/message dichotomy I found this wonderful little tumblr: called the Art of Google Books, it archives Google's virtual library's best incidents.
p.44-45 of Sketches of Young Gentlemen: Dedicated to the Young Ladies by Charles Dickens, Hablot Knight Browne (1838).
p. 270 of A Popular History of Reptiles (1843)
p. 22 of Cunningham's textbook of Anatomy by Daniel John Cunningham and Arthur Robinson, 1918.