Accession No

1082

Brief Description

telescope, axis and vertical circle of a transit instrument, by Jeremiah Sisson, English, 1763

Origin

England; London

Maker

Sisson, Jeremiah

Class

astronomy

Earliest Date

1763

Latest Date

1763

Inscription Date

1763

Material

metal (brass); glass

Dimensions

telescope length 1070mm; axis 660mm; aperture 38mm; circle diameter 450mm; box length 1245mm; breadth 760mm; height 122mm

Special Collection

Provenance

On loan from St. John’s College, University of Cambridge from 08/1951.

Inscription

‘J. Sisson London 1763’ (crossing of axis and telescope)

‘SISSON TRANSIT’ (box)

Description Notes

Telescope, axis and vertical circle only of brass transit instrument. Eyepiece missing, but object glass survives. Double cone shaped horizontal axis.
Circle divided on brass 0 - 90˚ - 0 - 90˚ - 0, numbered by 10˚, graduated to 1˚.

Condition good.

Key for this instrument may be on bunch of keys for St. John’s instruments. See location note and notes fields for more information.

References

Events