Jacob Herbert to Faraday   2 July 1846

Trinity House | 2d July 1846

My dear Sir,

I was much obliged by your Memorandum or letter of observations respecting the diameter of the Ventilating Tubes¹ when applied to lamps differing from the ordinary Argand Lamp:- it is important they should be attended to for the future, and I read the paper at the last Board.

I hope you are deriving both pleasure and advantage from your visit to Cromer - we have no Commission to give you, - but we do hope that you will visit all the Light Houses which may be within your reach,- and favor us with any observations respecting them which may occur to you.

I send you annex'd the Copy of some remarks recently made by Capt. Stephenson² when recently at the So. Foreland³. You are aware that the High Light is dioptric & that your ventilating apparatus for lamps in use with that description of apparatus has been applied thereat.

I remain, | My dear Sir, | Very faithfully Yours | J. Herbert

M. Faraday Esq