In fact, between the time I started this post last night and this morning, Google Books has removed the distorted copy of Wohlgemeynte Gedanken from its site. In its place now is a plain scan, low-res, but entirely legible, and a digitally generated cover image [but with the same, mangled title]. A side-by-side comparison [above] shows the same underlying scans, which means the distortions--and the fixes--all happened in post.
It also means I'm glad I grabbed the full PDF when I did. And that I formatted it, created a cover, and made it into a print version. Instead of the distorted black and white cover Google Books [still] shows online, I went with a beautiful full-color shot of the gold-stamped leather binding.
Also, while looking for a "Previously" link, I realized that somehow I had never posted about one of my favorite books, A Million Random Digits With 100,000 Normal Deviates.
So now I have.