Barometro aneroide da parete in ottone firmato John Barker & Son, primi '900.

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About the Item

Barometro aneroide da parete in ottone e vetro montato su tavola in legno di rovere tornito, firmato John Barker & Son Ltd Kensington. Si tratta di uno strumento il cui organo sensibile alla pressione è una scatola metallica detta capsula barometrica. Manifattura inglese dei primi del ‘900. Buono stato, funzionante. Diametro tavola cm 28 – inches 11, diametro barometro cm 19 - inches 7.5, spessore cm 10 – inches 4. La capsula si contrae o si dilata in conseguenza dei cambiamenti di pressione e i suoi movimenti sono trasmessi ad una lancetta indicatrice tramite un sistema meccanico. La messa a punto di questo tipo di barometro si deve a Bourdon, inventore e industriale francese (Parigi 1808-1884). Egli fondò a Parigi nel 1835 una fabbrica per la costruzione di macchine a vapore; nel 1849 inventò il manometro metallico, a cui legò il suo nome, e nel 1853 un tipo di barometro aneroide. Note Fin dall’antichità l’uomo, come agricoltore e navigatore, ha osservato e tentato di prevedere l’andamento del clima. Lo studio scientifico dei mutamenti che avvengono nell’atmosfera ebbe inizio alla metà del XVII secolo, in relazione agli esperimenti tendenti a dimostrare l’esistenza del vuoto, che gli antichi filosofi negavano poiché “la natura aborre il vuoto!”. Evangelista Torricelli (1608-1647), matematico e fisico, discepolo di Galileo, fu il primo, nel 1643 a costruire uno strumento in grado di rilevare i cambiamenti della pressione dell’aria, che egli comprese essere legati ai mutamenti del tempo atmosferico. Ultima foto confezione regalo. John Barker iniziò la sua carriera lavorando come venditore di tessuti a Folkestone e a Dover. Lavorò quindi per Spencer, Turner & Boldero e successivamente per William Whiteley in Westbourne Grove a Bayswater, Londra. Dopo che Whiteley si rifiutò di entrare in società con lui, egli decise di aprire un negozio su Kensington High Street con Sir James Whitehead, fondando la Barkers of Kensington, che divenne una società pubblica conosciuta come John Barker & Co Ltd nel 1894.

Dimensions:
Height: 4 in (10.16 cm)Diameter: 11 in (27.94 cm)
Materials and Techniques:
Brass
Period:
1900-1909
Date of Manufacture:
1900
Condition:
Wear consistent with age and use.
Seller Location:
Milan, IT
Reference Number:
1stDibs: LU1020237232592

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