Faraday to Peter Henry Berthon   5 June 1865

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