Victorian Carved Oak Admiral Fitzroys Storm Barometer by Negretti & Zambra Gilbert & Sons the Dollond’s had famously patented

the Dollond’s had famously patented the achromatic couplet

but also in what direction the destructive centre of the storm is moving

The ring is turned until a red arrow – that to the right of the segment marked “variable” – points to this normal pressure

The owner’s engraving is similar proof for dating purposes

Gabriel Wright had taken on a single apprentice in 1786 during his previous partnership with Gregory and by 1793 it should be presumed that Benjamin Hooke had completed his training as his name appeared next to that of Gilbert and Wright trading from Leadenhall Street until about 1800

Victorian Carved Oak Admiral Fitzroys Storm Barometer by Negretti & Zambra Gilbert & Sons the Dollond’s had famously patentedFor sale a Victorian carved oak stick Admiral Fitzroys Storm Barometer by Negretti & Zambra, London. This superior example of its type is comprised of an oak body with a cistern cover richly ornamented with a central floral motif, chamfered and carved stem and a carved domed top supported by scroll pediments either side. The stem is adorned with a large 13 inch thermometer showing both Fahrenheit and Centigrade scales on an opaline glass with red and