Accession No

0351


Brief Description

horizontal dial, purportedly by Butterfield, but in fact 1/4 18th C with later replacements (including gnomon)


Origin


Maker


Class

dials


Earliest Date

1700


Latest Date

1725


Inscription Date


Material

metal (brass, steel); glass


Dimensions

length 136mm; breadth 136mm; thickness 20mm


Special Collection

Robert Whipple collection


Provenance

Purchased by Robert Stewart Whipple from Antique Art Galleries, Grafton Street, London on 03/08/1927.


Inscription

‘Butterfield AParis
Pour 44 Degrez’


Description Notes

Square plate standing on 4 feet. Hour circle divided IIII - XII, I - VIII, numbered by I, subdivided to 15 minutes. Fixed gnomon; brass tipped with applied brass bird, crudely engraved. Corners of the plate decorated with fine floral engraving. Inset compass with cardinal points marked; half-blued needle (a later replacement?). Scratched onto base a divided circle not graduated but with a pointer, divided into 36 divisions to 1˚ and ‘AINE’.

‘The gnomon is a late replacement incorporating the ‘bird index’ as a redundant design feature. The inset compass bowl is also a replacement. The divisions on the reverse of the dial plate and the index are crude and poorly executed - perhaps in the same hand that botched the gnomon replacement.’ (catalogue)
Very faint letters and numbers marked inside the circle on the base; 25-1-2000.

Condition: fair.

[NOTE: On 15/04/2015 XRF analysis was conducted on this instrument. Results and analyses are given in the ‘Notes’ field.]


References


Events

Description
The horizontal dial is the most common form of sundial. The portable version proved very popular with the upper classes during the 19th Century. During this period it could best be described as the wristwatch of its day.

The hour lines are engraved onto a horizontal surface, with a gnomon (pointer) in the centre. Seasonal variations (caused by the earth’s orbit being elliptical, not circular) have to be compensated for, as they can affect the raw reading by up to 18 minutes.
18/10/2002
Created by: Saffron Clackson and Boris Jardine on 18/10/2002


FM:43129

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