Accession No

0721

Brief Description

ivory sphere for solid geometry, 1750–1850

Origin

Maker

Class

mathematics

Earliest Date

1750

Latest Date

1850

Inscription Date

Material

ivory; wood (mahogany); metal (brass)

Dimensions

diameter of sphere 51mm box side of base 68mm; total height 75mm

Special Collection

Provenance

Transferred from the Department of Mineralogy and Petrology, University of Cambridge, Cambridge, England, in 1968.

Inscription

Description Notes

Ivory sphere with equatorial line marked (no other lines marked).
Square mahogany stand with brass plate on top; degree scale around sphere divided [90˚] - [0] - [90˚], numbered by 10˚, subdivided to 5˚; the other semicircle is similarly divided but not numbered.

Condition fair (brass rather tarnished); complete.

References

Events