Royal Institution | 5 June 1865
Dear Sir
I beg to return you the specification1 with the figures put in at paragraph 13 in relation to the horizontal focal plane2[.]
I hoped to have seen some translations of the French results with the Electromagnetic machine. I heard from the Abbe Moigno that he had called on you[.]
Ever Truly Yours | M. Faraday
P.H. Berthon Esqr | &c &c &c
Please cite as “Faraday4552,” in Ɛpsilon: The Michael Faraday Collection accessed on 14 May 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday4552