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[Contact Clocks]

Contact clock according to Bowditch-Baltzar

Contact-Uhr nach Bowditch Baltzar

  Source   Zimmermann, E. 1904. Apparate zu experimental-psychologischen Untersuchungen nach Angaben des Herrn Prof. Dr. Sommer. Leipzig (Collection Rand B. Evans) view the source
  People   Bowditch, Henry Pickering (1840-1911)
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ISSN 1866-4784: reference - xlink