Oak cased John Trotter of Glasgow barograph


Oak cased John Trotter of Glasgow barograph


SKU: SA 22599 Category: Tags: ,

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oak cased barograph and thermometer by John Trotter of Glasgow, having a hinged five-beveled 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 seven stacked vacuum capsules and utilizes a gate suspension. The barograph has a thermometer and glass ink bottle recessed into the case.
Height 9 Inches
Width 14.5 Inches
Depth 9 Inches