λ A ROSEWOOD STICK BAROMETER BY THOMAS HARRIS, LONDON, C.1820-40 with an ivory thermometer and vernier scale inscribed 'Thos Harris Opticians to the Royal Family, Opposite the British Museum, LONDON', with a bone adjuster and turned reservoir cover 91.8cm high *This item is offered for sale in accordance with the Ivory Act 2018 and has been assigned an exemption certificate.

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