A rectangular wooden box with a slate slab top and four plastic knobs. The instrument has several dials set into the slate slab labelled. The leftmost large brown dial is labelled “ten thousands” with a scale from 0-10. To the right is another large brown dial labelled “thousands” with a scale from 0-10. To the right are four dials arranged in a square. The leftmost two are black and white and are labelled “calibrating resistance”. The rightmost two are red and white and are labelled “calibrating battery”. To the right, on the righthand side of the slate top, is another large brown dial labelled “x GALVO READING BY” with a scale from 1-500 counting “1, 2, 5, 10, 20, 50, 100, 200, 500, OFF”. There are eight terminals along the top edge of the slate top, above the dials, labelled in pairs “Patient”, “Galvo”, Calibrating Battery”, and “Bridge Battery”.
Accession Number: 2011.psy.40
Possibly a wheatstone bridge or potentiometer
Primary Materials: Wood, Plastic, Slate, metal (brass?)
University of Toronto label: “Department of Psychology Research Equipment No. 74 BRB 68, University of Toronto.”. Manufacturer’s label on slate top: “Gambrell Bros. Ltd., London; No. 4374”.
Height = 14.5, Width = 11.5, Length = 35.5
Possibly a wheatstone bridge or potentiometer.
Excellent. There is a crack on the bottom, as well as a few scratches.
Manufacturer: Gambrell Bros. Ltd., London.
Date of Manufacture:
Dept. of Psychology, University of Toronto
Additional Information and References: