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A MID-18TH-CENTURY MAHOGANY AND BOXWOOD 20-INCH RADIUS HADLEY'S QUADRANT
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A MID-18TH-CENTURY MAHOGANY AND BOXWOOD 20-INCH RADIUS HADLEY'S QUADRANT

Details
A MID-18TH-CENTURY MAHOGANY AND BOXWOOD 20-INCH RADIUS HADLEY'S QUADRANT
stamped to the left of the arc Fleet Street LONDON, boxwood lattice diagonal scale divided twice for 0-900, mahogany index arm with brass reader and clamp, swivel brass arm stop, mirrors and sliding pin hole sights, peg rests to the reverse (restoration, some replaced parts, lacking shades) -- 21½in. (54.5cm.) high overall
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No VAT will be charged on the hammer price, but VAT at 15% will be added to the buyer's premium which is invoiced on a VAT inclusive basis.

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Lot Essay

It has been suggested that this example was made by Benjamin Cole, a maker of high quality instruments in Fleet Street and who flourished between 1750 and 1766. He did not always fully sign his instruments but other similar examples are known by him. By the third quarter of the eighteenth century, the popular diagonal scale was being replaced by the more accurate vernier scale which, used in conjunction with precise scales from makers such as Ramsden, set the essential pattern of the instrument for the next one hundred and fifty years.
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