D*** Rivolta, Edinburgh A LATE GEORGIAN EBONY AND BOXWOOD-STRUNG MAHOGANY WHEEL OR 'BANJO' BAROMETER, having a swan-neck pediment with brass urn finial above a hygrometer, alcohol thermometer, (replacement) plain mirror in reeded ebonised surrounds silvered 20cm, (8in) diameter dial, and a silvered spirit level dial inscribed with the maker's name, 95.5cm, (37.6in) high.