Accession No

3799

Brief Description

actinograph, by Hurter and Driffield, English, 1890 (c)

Origin

England

Maker

Hurter and Driffield

Class

calculating

Earliest Date

1890

Latest Date

1890

Inscription Date

Material

wood; metal (brass); paper; plastic (ivorine)

Dimensions

length 115mm; breadth 70mm; height 30mm

Special Collection

Provenance

Purchased, 27/09/1991.

Inscription

‘Hurter & Driffield’s Actinograph
Patent No. 5545. 1888.’ (along ‘speed of plate’ rod)

Description Notes

Compact hand-operated light meter for calculating exposures for a variety of conditions. Device lies within a small hinged wooden box. Pasted in LH lid is label headed ‘Table of Factors’. In right hand side of box are 4 adjustable rods giving readings for Mean Light, Lens and Exposure in Seconds, Speed Index, and Speed of Plate.

Condition good; complete

References

Events