Acquisitions Editor: Cara Anderson Publishing Services Manager: George Morrison Project Manager: Mónica González de Mendoza Assistant Editor: Robin Weston Marketing Manager: Christine Degon Veroulis Cover Design: Dennis Schaefer Focal Press is an imprint of Elsevier 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA Linacre House, Jordan Hill, Oxford OX2 8DP, UK Copyright © 2007, John Huntington. Published by Elsevier, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, orransmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Permissions may be sought directly from Elsevier's Science & Technology Rights Department in Oxford, UK: phone: (+44) 1865 843830, fax: (+44) 1865 853333, e-mail: permissions@elsevier.co.uk. You may also complete your request online via the Elsevier homepage (http://elsevier.com), by selecting "Customer Support" and then "Obtaining Permissions." Recognizing the importance of preserving what has been written, Elsevier prints its books on acid-free paper whenever possible. Library of Congress Cataloging-in-Publication Data Application submitted British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. ISBN: 978-0-240-80937-3 For information on all Focal Press publications visit our website at www.books.elsevier.com 07 08 09 10 11 12 13 10 9 8 7 6 5 4 3 2 1 Printed in the United States of America