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Cone Indicating Sections


This is a transparent plastic cone, with transparent coloured plastic inserts that indicate different geometrical sections, including a circle and a parabola.

Accession Number: 2019.ast.122

Alternative Name:

Primary Materials: Plastic


On a label stuck to the base of the cone: “Made in West Germany”

Dimensions (cm): Base Diameter = 12.3, Height = 24


To demonstrate how geometrical curves and sections such as parabolas and circles can be made from a cone.


Excellent: The tip of the cone has chipped off, there are a few very minor scratches over the surface of the cone.

Associated Instruments:

Manufacturer: Unknown

Date of Manufacture: 1945-1989


This object may be associated with teaching at the Department of Astronomy & Astrophysics, either on the U of T Campus, or at the Dunlap Observatory. If the latter, it was moved from the David Dunlap Observatory in Richmond Hill in 2009, upon the sale of the observatory. They were 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: