Google is busily butchering books as they digitize them, by omitting any folded plates. The folded plates are an integral oart of the work. The only reason they are getting away with it so far is that the authors are all dead.
For every book thus butchered by Google, I'm entering a review like this:
"The failure of Google, one of the richest companies in the world, to digitize the plates at the end of this volume is incomprehensible, and has severely diminished the utility of the volumes to both laymen and scholars."
Yes it is nice that they digitize the books, but the authors put the plates in them for a reason. Especially if you can't read the language the book is written in, at least you can gain something from the plates, unless they are missing or only the outside fold is shown.