Science: Rotoring

Idlers along the Charles River in Cambridge, Mass., last week beheld a scene out of the sepia supplements of the Sunday papers. A beamy, 35-foot Navy cutter was moving steadily by, showing neither smoke nor sail and emitting a "put-put-put" altogether too faint to be coming from a gasoline motor proportionate to the craft's size. Men on the deck were observing a smokeless stack that rose amidships, a cylinder 3½ feet in diameter and 9½ feet high. The stack was revolving. The vessel was a U. S. rotorship—the first.

Lieutenants Joseph M. Kiernan and...

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