From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
1826-7
Source of text:
RS:HS 17.261
Summary:
Talks about Josef Fraunhofer's failing health and his making of flint glass.
Contributor:
John Herschel Project
Talks about Josef Fraunhofer's failing health and his making of flint glass.
Reports that an accident destroyed one of the pendulums used by G. B. Airy and WW in their Dolcoath experiments. Obtained some results and believes in the general soundness of the method employed.