Joshua Ronchetti to Faraday   31 March 18351

2 Hatton Gardens | London March 31st 1835

Dr Faraday

Sir

I take the liberty of submitting to your inspection a new Instrument (an Hydrometer) to determine the real Specific Gravity of fluids lighter than Water2. I trust its accuracy and simplicity of construction will meet your approbation. My motive for presenting this Instrument to you is I have been informed that you have been applied to by Government for an Instrument more correct and simple than the one which is at present in use - after you have given it a fair trial and feel satisfied of its accuracy and utility I beg the favour of your generosity to submit the same to the Gentlemen appointed on the Committee for the above purpose, by so doing you will confer a favour on

Your Obedient Servant | J. Ronchetti

PS | Enclosed you have a description of the construction and use of the Instrument3[.]


Address: Dr. Faraday | Royal Institution | Albemarle Street

1
Joshua Ronchetti. Manchester and London scientific instrument maker. See Rea (1988), 5 and letter 637.
2
See note 3, letter 761.
3
In RS MS MM 13.116.

Bibliography

REA, Anthony (1988): Manchester's Little Italy: Memories of the Italian Colony of Ancoats, Manchester.

Please cite as “Faraday0774,” in Ɛpsilon: The Michael Faraday Collection accessed on 4 May 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday0774