Faraday to James Timmins Chance   5 June 18651

[Royal Institution embossed letterhead] | 5 June 1865

Dear Sir,

I am so forgetful, that I fear in every thing of mistaking; and on referring to your table at page 101 of the Lights appendix & Index Vol2 I am afraid of making a mistake. The first column being heights of the light above the Sea, the others have relation to it? - so that the XIth gives the number of m.m. which the lamp has to be raised for its ray passing through the lens to reach the visible sea horizon. Please tell me whether I am right, - that at 300 feet height Column I 4½mm gives the visible depression of the Sea horizon?

Ever truly yours | M Faraday

James Chance Esq | &c &c &c

1
Apart from the signature, this letter is not in Faraday’s hand.
2
Parliamentary Papers, 1861 [2793] XXV, volume 1, p.101.

Please cite as “Faraday4553,” in Ɛpsilon: The Michael Faraday Collection accessed on 12 May 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday4553