A William IV mahogany and cross-banded wheel barometer, second quarter 19th century

A William IV mahogany and cross-banded wheel barometer, second quarter 19th century
The case with swan-neck pediment and turned bone urn finial, with hygrometer above mercury thermometer with bone register, the silvered 8in. main register with engraved centre, the spirit level below signed Abraham Optician Bath
40in. (103cm.) high