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History of Science Museum

Wooden Mounted Differential Thermometer, by William Ladd, 19th Century

Inventory Number 11733


Acknowledgement: © History of Science Museum, University of Oxford, inv.11733

Item type
Object
Makers
Ladd, W.
Primary inscriptions
'W. Ladd 11 Beak St. Regent St. W.'
Physical material
Glass
Wood
Object type
Thermometer
Dimensions
Height: 376mm Width: 344mm Depth: 139mm Weight: 1.05kg
Inventory No
11733

Description

Differential thermometer with valve to centre. On wooden mount stand, mounted with metal brackets. Inscription to front centre of mount. Handwritten letter 'M' in chalk to base. Differential thermometers were capable of measuring the small difference between two temperatures.