It seems fairly certain that the younger was trading under his own name by the 1750’s and he maintained a number of apprentices including his sons John (III) in 1764 and his second son William in 1769 although the latter was soon turned over to Peter Dollond
The former has a metal stand which provides a base for holding six Geissler tubes which are in turn fastened at the top by brass electrical connection points secures to the upstand
Clearly the device was not ultimately successful for Biester but he was confident enough to show his work to Isaac Newton and The Royal Society which should give you a flavour of the circles in which the elder John Gilbert was already moving
They were also appointed to supply The Admiralty and numerous marine surveying commissions ensued but it is also likely that the pressures of doing business with such large organisations gave birth to issues of cash flow concluding in 1828 with the firm’s bankruptcy
The treatise is bound with an 8-page price list covering 185 instruments available from Negretti & Zambra establishments in 1864
Rare Early Victorian Stick Barometer Weather Station by S&B Solomons of London Antique Steam engine It seems fairly certain thatFor sale a very rare early Victorian stick barometer weather station by S&B Solomons of London. Presented on a large seven and a half inch wide mahogany backboard with domed top and chamfered edge surround, the exposed barometer tube runs centrally down the full length of the instrument with half globe mahogany cistern cover to the base and cistern adjustment screw below. The two part boxwood barometer scale is styled with a similar design to the