In an underground city, Queen Phaestra uses a past-viewing machine of vague nature to show
the destruction of Atlantis to two good-hearted men. But Atlantis itself is not visited, and
there are no time phenomena apart from the viewing.
— Michael Main
This is accomplished by means of extremely complex vibrations penetrating earth, metals,
buildings, space itself, and returning to our viewing and sound reproducing spheres to
reveal the desired past or present occurrences at the point at which the rays of
vibrations are directed.