A Regency mahogany mercury stick barometer G. Davis, Leeds, circa 1825 With swan-neck pediment above moulded glazed aperture enclosing rectangular silvered Vernier scale calibrated in barometric inches opposing the usual observations and signed G. Davis, LEEDS to upper margin, the moulded flame figured and line-edged trunk with bone Vernier adjustment square over inset arch-glazed silvered Fahrenheit scale mercury tube thermometer, the rounded base with moulded domed cistern cover, 99cm (39ins) high. Gabriel Davis is recorded in is recorded in Clifton, Gloria Directory of British Scientific Instrument Makers 1550-1851 as an optician, mathematical and philosophical instrument maker working from 20 Boar Lane, Leeds from 1822 before relocating to number 24 in 1834 where he stayed until 1847. He was regularly commissioned to make a wide range of instruments for the Yorkshire gentry and scientific community and also had an outlet in Durham which also opened in 1834.