CONTENTS

ERRATA

- Page xxvi, chart title_45: for “F” read “P 7 ”; chart title 46,third line: for “P”s” read “P n s.”

Page 182, line 5: for “effect” read “affect.”

Page 305, line 1: for “£” read “i 1 .”

Page 418, line 5: for “ -f~ ” read “ —

Page 423, sixth line from bottom: for “6.7” read “7.3.”

Page 424, in chart title: for “P, P 7 , P'” read “P, P', FPage 426, line 2: for _^P’ and P'” read “P' and P”; line 4:

for “P'” read “P 7 ”; line 7: for “P 7 ” read “P.”

Page 442, line 6: for “leaves” read “leaving”; line 10, for“leaves” read “leaving.”