This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

A digital image of the Google logo appears in its characteristic multi-colored font.
This is a digital copy of a book that was preserved for generations on library shelves before it was digitized by Google as part of a project to make the world's books available online.
It has survived long enough to be no longer protected by copyright and to become public domain. A public domain book is a book that was never protected by copyright or whose legal copyright terms have expired. The classification of a book as public domain may vary from country to country. Public domain books are the link to the past, representing a historical, cultural, and knowledge-based heritage that is often difficult to discover.
Comments, notes, and other marginalia present in the original volume will appear in this file, as a testament to the long journey traveled by the book, from the original publisher to the library, to reach you.
Google is proud to be a partner of libraries to digitize public domain materials and make them universally available. Public domain books belong to the public and we are merely their custodians. However, this work is costly; therefore, in order to continue offering this service, we have taken initiatives to prevent illicit use by commercial subjects, including the imposition of restrictions on sending automated queries.
Furthermore, we ask that you:
Do not make commercial use of these files We have conceived Google Book Search for use by individual private users and we ask you to use these files for personal and non-commercial purposes.
Do not send automated queries Do not send automated queries of any kind to Google. If you are conducting research in the field of machine translation, optical character recognition (OCR), or other fields where you need to use large amounts of text, we invite you to contact us. We encourage the use of public domain materials for these purposes and we may be able to help you.
Keep the watermark The Google "watermark" that appears in each file is essential to inform users about this project and help them find additional materials through Google Book Search. Do not remove it.
Make legal use of it Regardless of the use you make of it, remember that it is your responsibility to ensure you make legal use of it. Do not assume that because a book is public domain for users in the United States, it is also public domain for users in other countries. The criteria that establish whether a book is protected by copyright vary from country to country and we cannot offer guidance on whether a specific use of the book is permitted. Do not assume that because a book appears in Google Book Search, this means it can be used in any way and in any country in the world. Sanctions for copyright violations can be very severe.
Google's mission is to organize information globally and make it universally accessible and useful. Google Book Search helps readers discover books from all over the world and allows authors and publishers to reach a wider audience. You can search the entire text of this book on the Web at http://books.google.com