We've just discovered the fantastic blog over at BibliOdyssey. They've got great images from all sorts of books. One of the most interesting things I found there is this post involving strange prints from this publication:
Athanasius Kircher SJ - 'Musurgia Universalis', 1650.You can find more musical items on their site by looking for the tag cloud at the very bottom of their blog, or by clicking here.
Online at the University of Strasbourg: Volume One, Volume Two.
"Kircher's best-remembered work is also his second largest. Musurgia Universalis is an exhaustive compendium of musical knowledge at the transition point between sacred renaissance polyphony and secular Baroque music.