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Universal equinoctial dial

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Universal equinoctial dial
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This universal portable equinoctial dial, a type of sundial, was made around 1840. It was sold by John Davis, a scientific instrument retailer who had a shop in Edinburgh's Princes Street in the 1840s.

The brass instrument is inscribed on the chapter ring 'J. Davies, Edinburgh'. It is universal in the sense that it can be set up to any latitude on the hinged altitude arc.

The dial bears a very close resemblance to examples bearing the name of W. & S. Jones of London, Dollond of London and Abraham & Co. of Liverpool and Glasgow.

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