Science: Devices

Spy Cameras. To spy upon factories whose chimneys spew smoke in violation of municipal ordinances, President Harvey N. Davis of Stevens Institute of Technology last week recommended a long range camera which automatically registers on a long film a picture of everything in its purview, every 30 seconds for eight hours. Shrewd pryers at once thought of many another use for such a device.

Turtle. At Canton, Mo., Mississippi river town quite like those which ingenious Huckleberry Finn knew, a snapping turtle paddled out of a sewer. To its tail was tied a cord. A man hauled at the cord until...

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