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A rectangular metronome in a brown woodgrain plastic case. The metronome has a dial on the front with numbers and a light that flashes when operated. There is a volume button on the back.

Contains two labels on the back. One square orange label for Ontario hydro electrical approach, and one round label indicating approval for electrical safety.

Accession Number: 2011.psy.9

Alternative Name:

Primary Materials:

Plastic with wood-grain patter, plastic, metal, electronics


On bottom, etched: “OP5173526”. Printed on the back: “Crystalab Model MP-100-PA, 110 V Ac-60 CY, 7 watts, Made in U.S.A by Crystal Research Laboratories Inc., Hartford, Connecticut”. Labelled on top: “Department of Psychology Research Equipment No. 360 ME 71, University of Toronto”

Dimensions (cm): Height = 35, Width = 11, Length = 11


Used to maintain a constant tempo by producing regular clicks.


Good condition, though there is slight warping of the back material.

Associated Instruments: 2011.psy.25


Crystal Research Laboratories, Inc., Hartford, Connecticut, USA

Date of Manufacture: c. 1940-1970


Dept. of Psychology, University of Toronto

Additional Information and References:

Historical Notes: