PREFACE
In conclusion, I offer my sincere thanks to the officials of libraries in this country and abroad for the facilities which they have generously placed at my disposal, and without which this book would be far more imperfect than it now is. To my colleague, Professor George M. Dutcher, I am much indebted for a revision of the second chapter; to Mr. Archibald Cattell, of Chicago, for a careful reading of the proof sheets; and to my wife for proof-reading and aid in preparing the index.
In view of the great war that is now devastating Europe, it is important to note that the corrected page proofs of the present book were returned to the printers a few days before the outbreak of hostilities.
W. E. M.
October 1, 1914.
