When the subject of power comes up for discussion, attention is usually centered about the source of the energy for our present and future requirements. This is all very well, for unless we know where our energy is coming from, we need indulge in but little worry as to what we are to do with it. But assuming that our wants are to be filled, in one way or the other, it is rather in order to examine the question of what we are to do with all this power for which we are calling upon the coal mine, the oil well, the waterfall, perhaps the tides and the rays of the sun, and, we hope some day, the very atoms that go to make up all matter. When we get it, what are we to do with it?