Great example in the long, varied history of communication devices going back to the ancients, but really picking up speed in the Renaissance. For more example

Great example in the long, varied history of communication devices going back to the ancients, but really picking up speed in the Renaissance. For more example of interesting optical communication devices I recommend Deep Time of the Media by Zielinski (it includes lots of pictures too!):http://mitpress.mit.edu/books/deep-time-media http://mitpress.mit.edu/books/deep-time-media