Cone Indicating Sections

Astronomy

Accession Number: 2019.ast.122

Description:

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

Primary Materials: Plastic

Markings:

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

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

Function:

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

Condition:

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

Manufacturer: Unknown

Date of Manufacture: 1945-1989

Provenance:

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.