A Cortti, Glasgow, Mahogany Banjo Style Barometer (Circa 1840)
  
A larger than the norm but well proportioned 4 glass banjo style barometer by A Cortti, 97 Nelson St, Glasgow. The unusual but elegant shaped Mahogany veneered case consists of a mirror with brass bezel at the top, the mercury boxed thermometer below with the 10"(254mm) Diam barometer gauged in inches from 28 to 31centrally positioned with marker button beneath and the level at the base inscribed A Cortti 97 Nelson St,Glasgow.