From:
J[oseph] Cranch
To:
Sir John Herschel
Date:
[1 September 1842]
Source of text:
RS:HS 5.370
Summary:
Would like JH's views on the suitabilities of the various makes of telescopes for their observatory.
Contributor:
John Herschel Project
Showing 1–5 of 5 items
Would like JH's views on the suitabilities of the various makes of telescopes for their observatory.
Has sent the papers on the eclipse to G. B. Airy.
About eclipse observations of 1842, together with JH's speculations about the existence of an atmosphere around the sun. Enclosed is an eclipse drawing by Francis Baily.
Does not feel qualified to judge the merits of the various makes of telescopes. Suggests that the Astronomer Royal may be able to help or one of the other observatories.
Thanks for RH's paper on mineralogy. JH has explored use of mercury together with iron in photography.