Text Online
From:
Michael Faraday
To:
William Henry Fox Talbot
Date:
9 May 1827
Source of text:
BL Talbot papers
Summary:
No summary available.
Contributor:
Faraday Project
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Tells WT about JH developing the thermographic paper which is susceptible to 'calorific' and 'chemical' rays of light.
Comments on use of muriate of lime on plants. Also on existence of unexplained bands on film and on presence of red light beyond normal spectrum with light originating from certain sources.
Willingly gives JH permission to engrave a portrait photograph taken with WT's process. WT asks JH if he would be willing to testify on WT's behalf if necessary, relating to infringement of patent rights. WT announces that John Hind has discovered another asteroid [Euterpe].
Asks JH to sign an affidavit that WT is the inventor of the calotype or talbotype as some are trying to break WT's patent hold.
Sends JH a copy of the affidavit [see WT's 1854-5-15] and asks for JH's emendations, if any, and his signature. Sends JH a photograph engraved on steel.