Treatise relative to the Testing of Water-Wheels and Machinery, James Emerson 1879 Web Page
The first edition of this famous work was the only engineering textbook that was banned by the Roman Catholic Church. I have the only 1st edition that I ever found. I can understand why it was banned!!! All offensive material was purged in the later editions including this Google reprint.
This link redirects you to an on-line, readable, Google Copy, of this famous, informative and still relevant textbook:
Treatise Relative to the Testing of Water-wheels and Machinery- ... - Google Books Result
I can not get this link to work. I suggest you type in James Emerson, Water wheels in your Google search. The book will come up referenced on a Google Book link. Click on the link and you will go to the book.