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PREFACE
to publish the book as it stands was probably the best thing I could do, does not prevent me from being painfully aware that it is full of defects.
Trinity College, Cambridge.
[This book is now reprinted without any alteration whatever, except that a few misprints and grammatical mistakes have been corrected. It is reprinted, because I am still in agreement with its main tendency and conclusions; and it is reprinted without alteration, because I found that, if I were to begin correcting what in it seemed to me to need correction, I could not stop short of rewriting the whole book.
G. E. M.]
Cambridge, 1922.
