Faraday to George Biddell Airy   30 November 1860

[Royal Institution embossed letterhead] | 30 Novr. 1860

My dear Sir

Very many thanks for your kindness in the note¹. I shall live in hopes.

You told me in April² I think that you found the lamp in Mr. Chances works arranged according to the accepted regulation required raising 5/16 of an inch to render the issuing ray horizontal. We have been making experiments together & find amongst the corrections needed a quantity nearly of that amount. May I refer to what you told me as confirmation that in the changes proposed we are so far justified by your result? Do not trouble yourself to write if you consent if you dissent then perhaps you will say no ³[.]

Ever Yours Obliged | M. Faraday

G.B. Airy Esqr | &c &c &c