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Walnut cased Barograph by Mappin and Webb

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Mappin Webb walnut-cased Barograph, having five beveled glazed removable lid, and a drawer below to house the charts. The mechanical eight-day movement is housed in the drum, fitted with a seven-day chart that covers one full rotation of the drum. The ink trace, or barogram, on the recording paper, is a visual record of changes in pressure.
The aneroid barometer mechanism has seven stacked vacuum capsules and utilizes a gate suspension, a refinement developed to improve sensitivity. The barograph has a thermometer and its original glass ink bottle recessed into the case.
Dimensions
Height 9 Inches
Width 15 Inches
Depth 10 Inches Pricesold Datecirca 1910  1910s Antiques MaterialWalnut MakerMappin & Webb | Silversmiths Item codeas135a4714 StatusSold

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CH35DB

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Item Walnut cased Barograph by Mappin and Webb

 

Item Code as135a4714

 

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