Front matter
Reading edition
EDMUND CALLIS BERKELEY
Consultant in Modern Technology President, E. C. Berkeley and Associates
JOHN WILEY & SONS, INC., NEW YORK CHAPMAN & HALL, LIMITED, LONDON
Copyright, 1949 by EDMUND CALLIS BERKELEY
All Rights Reserved
This book or any part thereof must not be reproduced in any form without the written permission of the publisher.
Second Printing, February, 1950
Printed in the United States of America
To my friends, whose help and instruction made this book possible