Dollond - London. Georgian mahogany stick barometer. 
Good quality early 19th Century Cuban mahogany Stick Barometer with ‘swan-neck’ pediment over signed, engraved silvered brass register plate bearing mercury Fahrenheit thermometer, manually operated vernier slide and protected by reeded, lockable glazed door. The trunk, edge moulded, ebony strung and veneered in figured mahogany with concealed barometer tube terminating behind turned cistern cover. c1820 Perhaps the most renowned of barometer makers, the firm of Dollond was founded in the mid 18th Century by Peter Dollond [who became Instrument Maker and Optician to King George II] and which flourished for 150 years until its acquisition by Aitchison in 1913.