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This article in AJ

  1. Vol. 61 No. 2, p. 327-328
    Received: May 13, 1968

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Modifications of Pfeifer's Bird-Control Apparatus1

  1. R. C. Rosenau and
  2. R. V. Worstell2



Pfeifer's bird-control apparatus was modified and tested in 1967. Several safety feasures were incorporated. Also, an industrial timer was added as an interrupter to break the circuit from a high voltage transformer at regular, short intervals providing the arcing and snapping needed in a dry climate.

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