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This is a digital copy of a book that was preserved for generations on library
shelves before it was carefully scanned by Google as part of a project to make
the world's books discoverable online. It has survived long enough for the
copyright to expire and the book to enter the public domain. A public domain
book is one that was never subject to copyright or whose legal copyright term
has expired. Whether a book is in the public domain may vary country to
country. Public domain books are our gateways to the past, representing a
wealth of history, culture and knowledge that's often difficult to discover.
Marks, notations and other marginalia present in the original volume may appear
in this file - a reminder of this book's long journey from the publisher to a
library and finally to you.
Google Book Search has digitized millions of physical books and made them
available online at
http://books.google.com
. The digitization at the most basic level is based on page images of the
physical books. To make this book available as an ePub formated file we have
taken those page images and extracted the text using Optical Character
Recognition (or OCR for short) technology. The extraction of text from page
images is a difficult engineering task. Smudges on the physical books' pages,
fancy fonts, old fonts, torn pages, etc. can all lead to errors in the
extracted text. Imperfect OCR is only the first challenge in the ultimate goal
of moving from collections of page images to extracted-text based books. Our
computer algorithms also have to automatically determine the structure of the
book (what are the headers and footers, where images are placed, whether text
is verse or prose, and so forth). Getting this right allows us to render the
book in a way that follows the format of the original book.
Despite our best efforts you may see spelling mistakes, garbage characters,
extraneous images, or missing pages in this book. Based on our estimates, these
errors should not prevent you from enjoying the content of the book. The
technical challenges of automatically constructing a perfect book are daunting,
but we continue to make enhancements to our OCR and book structure extraction
technologies.
We hope you'll enjoy these books as much as we do.
Usage guidelines
Google is proud to partner with libraries to digitize public domain
materials and make them widely accessible. Public domain books belong
to the public and we are merely their custodians. Nevertheless, this
work is expensive, so in order to keep providing this resource, we
have taken steps to prevent abuse by commercial parties, including
placing technical restrictions on automated querying.
We also ask that you:
About Google Book Search
Google's mission is to organize the world's information and to make
it universally accessible and useful. Google Book Search helps readers
discover the world's books while helping authors and publishers reach
new audiences. You can search through the full text of this book on
the web at
http://books.google.com