Science: Ship-finder

On a cliff 200 feet above the sea stand the two towers of Navesink Lighthouse Station, near Atlantic Highlands, N. J.

One dark, still night last week sentries guarded the lonely road to the Navesink station. No wisp of fog was in the air.

Pricking the blackness a few miles offshore were the lights of the Coast Guard cutter Pontchartrain, cruising slowly.

Promptly at midnight the Pontchartrain's lights went out and the boat vanished in the night. On the hilltop slick-haired, thin-lipped Captain Lawrence L. Clayton of the U. S. Army Signal Corps and...

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