Accession No

1557

Brief Description

Bequerel phosphoroscope, by J. Duboscq, French, 2/2 19th Century

Origin

France; Paris; Rue de l’Odéon

Maker

Duboscq, J.

Class

optical

Earliest Date

1850

Latest Date

1900

Inscription Date

Material

metal (brass, oxidised brass); wood (cork and two others); glass; stone; paper

Dimensions

length 145mm; breadth 140mm; height 160mm; crystals’ box length 120mm; breadth 44mm; height 29mm

Special Collection

Cavendish collection

Provenance

Transferred from the Cavendish Laboratory, University of Cambridge.

Inscription

‘J. Duboscq à Paris’ (one side of main chamber)

Description Notes

Brass and oxidised brass drum containing disc with sectors cut out of it which is turned by a series of gear wheels outside the drumand driven by a wooden handle. A tube on top of the instrument allows the scintillations to be viewed.
Wooden box with sliding lid contains three crystals; note on top reads ‘J. Duboscq Cristaux p. phosophoroscope. 21, Rue de l’Odéon, Paris’.
Envelope contains one further crystal, originally set in brass-bound cork which slides into side of chamber.

Condition good; complete.

References

Events