Accession No

1499

Brief Description

polarising saccharimeter, by J. Duboscq-Soleil, French, 2/2 19th Century

Origin

France; Paris; Rue de l’Odeon

Maker

Duboscq-Soleil, J.

Class

optical

Earliest Date

1850

Latest Date

1900

Inscription Date

Material

wood (mahogany); metal (brass, oxidized brass); glass; cloth (velvet)

Dimensions

height 1500mm; depth 630mm; breadth 560mm

Special Collection

Cavendish collection

Provenance

Transferred from the Cavendish Laboratory, University of Cambridge.

Inscription

‘J. Duboscq-Soleil,
Rue de l’Odéon à Paris.’ (on degree scale)

Description Notes

Tripod stand supports hexagonal mahogany pillar on which pivots a mahogany plank. The plane of the plank is fixed by a pivotted wooden rod which passes through the centre of a hinged pillar attached to the stand. The instrument is locked by a wooden screw on the central pillar. Mounted on the mahogany plank is a ‘V’ shaped oxidized brass channel. At the eye end is a brass degree scale divided 0 - 180 - 0 numbered by 10 subdivided to 30´ with vernier reading to 1´. Eyepiece missing. The objective end consists of a short brass tube beyond which is pivotted a dark glass mirror whose angle can be adjusted by screw-operated spring. The angle of the mirror is recorded on a metal disc divided 0 - 90˚ numbered by 30 subdivided to 5. A rod along the edge of the plank hold a piece of black velvet which folds over the channel when the instrument is in use.

Condition good; incomplete

References

Events