Mechanical thermometer Size:S: 45 x 30cm Imperialism

Imperialism

It might be awk'ard if you was to let 'em loose

Head and shoulders portrait of the Comte de Buffon

Within an inscribed oval surround

Mechanical thermometer Size:S: 45 x 30cm ImperialismScheme for a thermometer using temperature variations in an iron rod to move a dial on a clock face temperature scale. The textual account notes that the melting points of metallic elements might be tried and marked upon the scale. From the manuscript copy of 'A discourse concerning the usefulness of thermometers in chemical experiments together with a description and uses of a new invented metalline thermometer', by Cromwell Mortimer. The drawing is