Leonardo Da Vinci's Personal Notebook
IZ Reloaded writes "The British Library has made available 14 great books on its website. One of them is a 1508 notebook by Leonardo Da Vinci containing short treatises, notes and drawings of a wide range of subjects from mechanics to the moon. The site allows you to view the original manuscript written in Leonardo's own handwriting."
from their site:
There are also alternative non-Shockwave versions of three of the volumes. More will be added soon.
The complete notebooks have been available from project gutenberg for a year and a half (without the pictures) at: http://www.gutenberg.org/etext/5000 It's also been on the top 100 list for a long time.