Short and Mason, London, mahgoany-cased Barograph, having five glazed removable lid. 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 eight stacked vacuum capsules and utilizes a gate suspension, a refinement developed to improve sensitivity. Retaining its original glass ink bottle recessed into the case.
Height 7 Inches
Width 14 Inches
Depth 8 Inches