LONGMANS, GREEN, AND CO.

FOURTH AVENUE & 30TH STREET, NEW YORK

PRAIRIE AVENUE & 25TH STREET, CHICAGO

Copyright, 1910,

BY
LONGMANS GREEN AND CO.

FIRST EDITION, JULY, 1910

REPRINTED, JUNE, 1913, MAY, 1915, MARCH, 1917

CONTENTS

INTRODUCTION