Description

oak cased barograph and thermometer by Negretti & Zambra, 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.
Dimensions
Height 8.5 Inches
Width 14.5 Inches
Depth 9 Inches