Mechanical thermometer Size:S: 45 x 30cm Bird identified by Catesby as

Bird identified by Catesby as 'Monedula purpurea'

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

attached to a long pole carried on his shoulder

The Ringmaster is the Conservative Prime Minister

Mechanical thermometer Size:S: 45 x 30cm Bird identified by Catesby asScheme 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