Pelicans ISBN 0 14 02.2873 X - Infinite in All Directions Gifford Lectures Given at Aberdeen Scotland

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Published by the Penguin Group 27 Wrights Lane, London W8 5TZ, England Viking Penguin Inc., 40 West 23rd Street, New York, New York, 10010, USA Penguin Books Australia Ltd, Ringwood, Victoria, Australia Penguin Books Canada Ltd, 2801 John Street, Markham, Ontario, Canada, L3R 1B4 Penguin Books (NZ) Ltd, 182-190 Wairau Road, Auckland 10, New Zealand

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First published in the USA by Harper & Row 1988 and published simultaneously in Canada by Fitzhenry & Whiteside Published in Penguin Books 1989 1 3 5 7 9 10 8 6 4 2

Copyright © Freeman J. Dyson, 1988 All rights reserved

Copyright acknowledgements appear on page 321

Made and printed in England by Cox and Wyman Ltd, Reading

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