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viii and practice with relation to similar undertakings elsewhere in sufficient accuracy of detail to ensure constructive change based upon approved modern practice, is necessary.

"It is as an aid to the citizen and the administrator who sees that to planned achievement in public enterprises a comprehensive, accurate knowledge of planning law is essential, that these lectures have been prepared."

The lectures form the nucleus of the present book, in which the progress of the past six years has been recorded and the subject has been brought up to date. Wherever City Planning is practised or studied this work should be an indispensable reference and guide both for the professional and for the layman, and as such it should be a powerful influence in the necessary widespread education in all matters pertaining to civic improvement.

City Planning is a vital question; there is no human endeavor that s not intimately affected by it. Its success in the United States, more than upon any other factor, depends upon the intelligent development of public opinion. It is evidently more and more necessary to educate not only those who are directly concerned with the work, but the legislative bodies who can do so much to forward or retard its progress, and above all the American citizen who is in the end the controller of his own destinies.