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Cenco-Howard Polarizines


Small black box with a silver latch containing four glass slides inside. The four slides contain the following polarizines: cellophane layers, selenite crystals, cellophane design and thymol crystals.

Accession Number: 2011.psy.50

Alternative Name:

Primary Materials: plastic; glass


Manufaturer’s label on the top of the box “Central Scientific Co., Chicago, USA, 460 East Ohio St.”

Dimensions (cm):

Box: Height = 6, Width = 4, Length = 8; Slides: Width = 5, Length = 5

Function: To alter light.

Condition: Excellent

Associated Instruments:


Central Scientific Co., Chicago, USA, 460 East Ohio St.

Date of Manufacture:


Dept. of Psychology, University of Toronto

Additional Information and References:

Historical Notes:

Central Scientific Company was founded in 1900 in Chicago.
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The instrument is made up of five parts: one box and four slides.