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Gorham's kaleidoscope top. By Griffin, London

  Source   Anonymous. 1892. Harvard Psychological Laboratory in Dane Hall: Instruments for Experiments on Sight. Photograph. (Harvard University Archives - HUPSF Psychological Laboratories (7)) view the source
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  Sites   Psychological Laboratory, Harvard University (1893)
  Related Literature   Münsterberg, Hugo. 1893. Psychological Laboratory of Harvard University. Cambridge, Mass.: University Press of Cambridge, Mass.
(description and figure).
Gorham, John. 1859. The Rotation of coloured Discs applied to facilitate the Study of the Laws of Harmonious Colouring, and to the Multiplication of Images of Objects into Kaleidocopic combinations: Multiplied figures by Rotation. Quarterly Journal of Microscopical Science s1-7 (26): 76-78, on p.77.
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ISSN 1866-4784: reference - xlink