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 have
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ACKNOWLEDGMENTS

HIS study could not have been written without the
valuable and stimulating suggestions of Professor
G. P. Adams and Professor F. J. Teggart. Especially
to the latter I owe a debt which I have not been able to
acknowledge in direct reference or in quotation marks.
His books and the personal contact of years have been an
inspiration for which I take this opportunity to express
my gratitude.
In the revision of the manuscript I have received the
valuable advice and criticism of a number of friends; in
particular, Miss Lola Jean Simpson and Miss Leona Fassett.


rection.

T S.

EY.