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Document number: 9020
Date: 30 Sep 1865
Recipient: TALBOT William Henry Fox
Author: BROWNING John
Collection: British Library, London, Manuscripts - Fox Talbot Collection
Last updated: 1st September 2003

< letterhead, including prizes and awards in International Exhibition, 1862 for instruments made>

111, minories,

(Manufactory, 6, Vine Street.)

London, E. C.

Sep 30 1865

Dear Sir

I am obliged for your esteemed favor.

It is intended that the knife-edges should be slid up and down in the undercut slide to allow of different portions of the spectrum being brought into the fields of view. thus <drawing of the knife-edges up and another of them down>

If there is not sufficient adjustment, or play, allowed to permit of this being done, effectually, please to return the instrument and I will have it altered with great pleasure.

Believe me Dear Sir Your Obed Servt

John Browning

Fox Talbot Eq FRS.

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