Mechanical thermometer Size:S: 45 x 30cm attached to a long pole

attached to a long pole carried on his shoulder

Bird identified by Catesby as 'Monedula purpurea'

Head and shoulders portrait of the Comte de Buffon

a wealthy young american botany student

1984 Olympic Games in Los Angeles

Mechanical thermometer Size:S: 45 x 30cm attached to a long poleScheme 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