This hypothetical view of a construction project is from near the equator of an alternate Earth whose period of rotation is 1.41 hours, rather than the customary 24. A lot of work can get done during that shorter day, since the effects of gravity are cancelled out by the increased centrifugal force. Here, a worker is shown tossing a steel beam to his colleague.

The caption notes one disadvantage, namely, that the guy on top needs to be a good catch, since if he misses, the beam will simply keep flying, never to return.

The image appears in the December, 1920, issue of Science and Invention.

The workers must have adapted well to their new environment, since presumably all of the air would have also floated away long ago.

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