American Barometer by James Green of Historic Interest
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Description
Labelled Jas. Green New York.Mid 19th century40in.After organizing a national Weather Service, the Smithsonian Institution commissioned James Green to make instruments suitable for distribution around the country. This portable mercury barometer, is of that sort. It has a sliding vernier operated by a head screw at the top of the tube, a Fahrenheit thermometer in the side of the tube, and a thumb screw that adjusts the volume of the cistern
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American Barometer by James Green of Historic Interest
Estimate $300 - $500
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