THIS little book purports to serve as an introduction to the great problems of space, time and motion. The inquiries it is concerned with are very old. Men have been forming ideas concerning space and time since times immemorial, and curiously enough, have been writing and fighting about these things with the greatest interest, even fanaticism.

This has been a strange strife, indeed, having little to do with economic necessities; it has always dealt with abstract things, far removed from our ...

The electrical problems of the present day lie largely in the economical transmission of power and in the radical improvement of the means and methods of illumination. To many workers and thinkers in the domain of electrical invention, the apparatus and devices that are familiar, appear cumbrous and wasteful, and subject to severe limitations.

They believe that the principles of current generation must be changed, the area of current supply be enlarged, and the appliances used by the consumer...