The British Library has completely digitized 570 pages of Leonardo da Vinci's visionary notebooks (The Codex Arundel) Pretty interesting to flip through and check out his various schematics

I was really hoping I could find some translations of at least parts of it since it's been online since August of last year but I can't seem to. It's the kind of thing a publisher could make decent money on if they had it translated side by side. I know I'd but it at least.