This barometer was made by Englishman James Pitkin and sold by the firm of James & Henry J Green in the USA. Pitkin worked from 1858 to 1900 for optical and philosophical instrument makers in London. He worked briefly in partnership with Thomas W Short, who later founded Short & Mason.

James and his son Henry J Green formed a partnership only from 1879 to 1885, which dates when this barometer was sold. It's small, 2.75 inches in diameter. and just over an inch deep. It has a brass case and weighs 0.6 pounds. It's in good working condition.

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