A WILLIAM IV/EARLY VICTORIAN MAHOGANY MERCURY STICK BAROMETER Crichton, London, circa 1835 The arched glazed silvered Vernier scale calibrated in barometric inches and with the usual observations beneath signature Crichton, 112 Leadenhall St., London to the right hand side opposing mercury tube Fahr't and Reau'r scale thermometer positioned to the left, with arched slender moulded surround over exposed tube to the trunk incorporating Vernier adjustment square to the trunk, the rounded base with hemispherical cistern cover and level adjustment screw to underside. 93.5cm (36.75ins) high. John Crichton is recorded in Clifton, Gloria Directory of British Scientific Instrument Makers 1550-1851 as working from 112 Leadenhall Street, London, 1834-65. Condition Report: The tube is filled with no apparent airlocks. The scale/register plate has some slight discolouration to the upper left of the arch otherwise is in good original condition with fine clear engraving and even silvering. The thermometer is in good condition. The case is in fine condition with the only noticeable fault being a small section of replaced moulding to the lower left corner of the surround. Faults are otherwise very much limited to minor age related shrinkage, bumps and scuffs. Condition Report Disclaimer