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Adjustable Light Source


A black metal base with black metal lightbox attached – attached on a hinge with a butterfly clasp. Back flap of lightbox has three punched holes at bottom and hinge at top opens to reveal a socket for a light bulb (not present.) There is a hole at the bottom of the light box, possibly for a power cord. Top of lightbox has hole that is covered by another sheet of metal that is bent on two sides to go over hole but does not cover it completely; it is open on the other two sides. Attached to the front of the lightbox is a black metal lens. Inside the box a glass lens can be seen. Outside the box the lens tube protrudes 3.3cm. A lever on the front of the lightbox can be moved to adjust the aperture. A company name plaque and serial number are attached to one side of the box.

Accession Number: 2011.psy.2

Alternative Name:

Primary Materials: Metal, Glass.


Company plaque attached to side of box: “Bausch & Lomb Optical Co. Rochester, NY, U.S.A. Serial No. (none) Type 31-33-85 CSA APP NO. 982” – also logo of B&L.

Dimensions (cm):

Height = 22.6, Width = 10.4, Length = 20.7



Good. Some rust beginning to appear on metal attachment piece between box and base; some rust on hinge to back flap; mild rusting inside box.

Associated Instruments:


Bausch & Lomb Optical Co, Rochester NY.

Date of Manufacture:


Department of Psychology, University of Toronto.

Additional Information and References:

Historical Notes: