University of California Press, one of the most distinguished university presses in the United States, enriches lives around the world by advancing scholarship in the humanities, social sciences, and natural sciences. Its activities are supported by the UC Press Foundation and by philanthropic contributions from individuals and institutions. For more information, visit www.ucpress.edu.

University of California Press
Oakland, California

© 1999 by The Regents of the University of California

ISBN: 978-0-520-29073-0 (cloth)
ISBN: 978-0-520-29074-7 (paper)
ISBN: 978-0-520-96478-5 (ebook)

The Library of Congress has cataloged an earlier edition of this book as follows:

Library of Congress Cataloging-in-Publication Data

Newton, Isaac, Sir, 1642–1727.
[Principia. English]
The Principia: mathematical principles of natural philosophy / Isaac Newton; a new translation by I. Bernard Cohen and Anne Whitman assisted by Julia Budenz; preceded by a guide to Newton’s Principia by I. Bernard Cohen.
p. cm.
Includes bibliographical references and index.
ISBN 978-0-520-08816-0 (alk. paper)—ISBN 978-0-520-08817-7 (alk. paper)
1. Newton, Isaac, Sir, 1642–1727. Principia. 2. Mechanics—Early works to 1800. 3. Celestial mechanics—Early works to 1800. I. Cohen, I. Bernard, 1914– . II. Whitman, Anne Miller, 1937–1984. III. Title.
QA803.N413 1999
531—dc21

Printed in the United States of America

25 24 23 22 21 20 19 18 17 16
10 9 8 7 6 5 4 3 2 1

The paper used in this publication meets the minimum requirements of ANSI/NISO Z39.48-1992 (R 2002) (Permanence of Paper).