Google have digitized and made available hundreds of thousands of public domain books from the Bodleian and other Oxford libraries on Google Book Search. You can find the first English translation of Newton's Mathematical principles of natural philosophy from 1729, the first edition of Jane Austen's Emma, and John Cassell's Illustrated History of England. You can search and read the full text of these works on Google Book Search, and download and print a pdf if you wish to.