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This is a cylindrical brass weight with a small hook on the top. The top of the weight has a bevelled edge with a ridged rim. The hook is silver in colour, and quite small.

Accession Number: 2019.ast.197

Alternative Name:

Primary Materials: Metal: Copper Alloy, Metal: Iron Alloy


Dimensions (cm): Diameter = 5.3, Height = 6


This weight is to be used with a piece of apparatus that requires a dangling weight, for example a timing or timed device. It could also be intended as a weight.


Good: The weight is in good condition. The metallic surface of the weight is marked and corroded in places, particularly around the base where the surface is blackened.

Associated Instruments:


Date of Manufacture: 20th Century


This object was likely moved from the David Dunlap Observatory in Richmond Hill in 2008, upon the sale of the observatory. It was stored at the Department of Astronomy and Astrophysics until 2017 when it was moved to a new storage location in McLennan Physical Laboratories.

Additional Information and References:

Historical Notes: