image tracts_678_7_1
Image number: RS.11422
Credit: ©The Royal Society

Observing with the dipleidoscope

Date

1845

Object type

Material

Technique

Dimensions

height (print): 208mm
width (print): 103mm

Subject

Content object

Description

Scene showing a gentleman taking a solar observation using the dipleidoscope and a pocket watch. The man is standing at the top of a stone staircase outside a house, with the main instrument on a balustrade. The dipleidoscope was developed by E.J. Dent and J.M Bloxham as a simple means of determining the Sun’s passage over the meridian at noon and therefore to set watches accurately to local time.

From the pamphlet A description of the dipleidoscope, or double-reflecting meridian and altitude instrument; with plain instructions for the method of using it in the correction of time-keepers, by Edward J. Dent (London, for the author, 1845).

The print is captioned below: ‘ILLUSTRATION OF THE SIMPLE MODE OF TAKING AN OBSERVATION WITH THE DIPLEIDOSCOPE.’

Edward John Dent (1790-1853), was a British chronometer maker with a first-class reputation for making accurate timepieces. The firm of E.J. Dent was established at 86 Strand, London, from 1840.

Associated place

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