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Document number: 309
Date: 09 May 1827
Dating: reference to cyanogen & Doc no 01560
Recipient: TALBOT William Henry Fox
Author: FARADAY Michael
Collection: British Library, London, Manuscripts - Fox Talbot Collection
Last updated: 29th March 2012

Royal Institution <1>
May. 9th

Dear Sir

Occupations in the city have taken me from home the last two days so continually that I have not had opportunity of replying to yours of Monday. <2> The bleaching or rather disinfecting powder may be procured at Waughs 177 I think it is in Regent Street<3> The experiment on the Cyanogen lamp <4> I shall be very happy to make for you

I am Very Truly Yours
M Faraday

H. F. Talbot Esqr

Notes:

1. Royal Institution, London.

2. Letter not located.

3. Waugh’s the chemist remained at 177 Regent Street until at least 1883.

4. In May of 1827, WHFT met with Faraday and JFW Herschel to examine the spectra emitted by Cyanogen and ‘Fires’, flammable mixtures containing metal salts that can occur in various colours characteristic to each metal. These experiments were an extension of WHFT’s work published as, ‘Some Experiments on Coloured Flames’, Edinburgh Journal of Science, v. 5 no. 1, June 1826, pp. 77–82.

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