"The distinguished architect, the author of this book, has been in demand all over the world, not only as an architect, but as a lecturer on kindred subjects. His solutions to many of our problems have in the past seemed revolutionary, but nowadays many of his first tenets have become orthodox practice. Professional publications have long since disseminated his theses, and the discussions of innumerable congresses turned on them; the popular press took a hand and partisan feeling ran high. On one side there has always been youth and all the dynamic forces of opinion; on the other, an often savage opposition. Few men have been the subject of so much argument which has been too often embittered by calumny. This study of the means of communication (air, water, rail and road) sets out conclusions based not only on an uninterrupted flow of experiment, but also upon building projects set up all over the world and upon actual plans for cities. The author claims for his theories the accuracy of laboratory tests. Furthermore, each proposal has been submitted to public opinion; to that of the eventual user, the looker-on, the specialist, the critic." -- from interior flap. Translated into English by Dorothy Todd. Printed in black-and-white.