Disk with Hole at Centre

Physics · Unidentified

Accession Number: 2009.ph.94


This is a large, flat and circular metal disk with a round hole in its centre measuring 1.8cm in diameter. The disk has straight and parallel scratches across its surface on both sides, appearing like striations on the surface of the metal from one side to the other, as if it has been moved against another surface in one direction only.

Alternative Name:

Primary Materials: Metal: Copper Alloy?


Dimensions (cm): Diameter=25, Width=0.2


Good: The surface of the metal has been coated. Aside from the scratches, which appear on both sides of the object, this is in good condition.

Associated Instruments: 2009.ph.93, 2009.ph.92

Manufacturer: Locally made?

Date of Manufacture: 20th Century


University of Toronto Department of Physics

Historical Notes:

  • Donated to UTSIC