Very cool. I was grumbling about the absence of a straightforward .PDF download, but there actually is one, if you click on the "Impression ou telechargement du fichieres" (sp?) button at the bottom of the online viewer window.

It's relatively large (336 MB), though, and much of the content is text that looks like it was handwritten in Elvish. The image of the title page shown at the openculture.com link has been color-corrected nicely, so the actual document looks significantly duller in comparison.