Late Eighteenth Century Mahogany Stick Barometer by Gilbert London black glass artifical horizon John Gilbert (II) is also

John Gilbert (II) is also one of the few London makers that also had a contract arrangement with the Dollonds’ for selling their patented achromatic lenses and this was certainly the case by 1764

Unless further evidence comes to light

Regarding the company itself

Note: This busy and somewhat confusing period of the Gilbert family history is ripe for more interrogation

Late Eighteenth Century Mahogany Stick Barometer by Gilbert London black glass artifical horizon John Gilbert (II) is alsoFor sale, a Late Eighteenth Century Mahogany Stick Barometer by Gilbert of London. A simply designed yet beautifully robust example comprised of a solid mahogany backboard with domed top and base. The inset bone scale plate is engraved with weather indications to the left and and a scale to the right measuring 27 to 31 inches of barometric pressure with a sliding Vernier incorporated for fine measurement. The head of the scale is simply engraved with