Note 5 — Chapter XVII
Reading edition
The Power House on the Hudson dam was operated by inert machinery and manned entirely by humans—the only place in the city which was so handled. This was because of its extreme importance. The air-power was broadcast from there. Without that power the entire several hundred mile district around New York would be dead. No aircraft could enter, save perhaps some skilfully handled motorless glider, if aided by sufficiently fortuitous air currents. Every surface vehicle used this power, and every sub-sea freighter. The city lights, and every form of city power, were centralized here also, as well as the broadcasting audible and etheric transmitters and receivers. Without the Power House, New York City and all its neighborhood would be inoperative, and cut off from the outside world.