Accession No

2697 also 0990 (?)

Brief Description

protractor, by John Rowley, English, 1700

Origin

London; England

Maker

Rowley, John

Class

drawing

Earliest Date

1700

Latest Date

1700

Inscription Date

Material

metal (brass)

Dimensions

Special Collection

Provenance

believed to be part of set of Rowley instruments (Wh. 1012) at Trinity College

Inscription

‘J Rowley Fecit’

Description Notes

Brass semicircular protractor. Arc divided 0 - 180˚, numbered by 10˚, subdivided to 1˚ and divided 180˚ - 0, numbered by 10˚. Bevelled inside edge of arc graduated 12 - 4 - 12, numbered by 1 on diminishing scale for regular polygons; 12 corresponds to 30˚, 6 to 60˚, 4 to 90˚. Notch in centre of diameter.

References

Events