From:
Sir John Herschel
To:
the R.A.S.
Date:
[29 June 1864]
Source of text:
RAS: MSS Add.29 [suppl.]
Summary:
Learned that R.A.S. plans to use aplanatic lenses for solar studies. Submits set of unpublished tables by W. L. Newman [see Newman's 1845-2-18] for calculating radii of such lenses. Refers to work of this kind by Josef Fraunhofer, [G. P.] Bond, K. A. Steinheil, and C. F. Gauss.
Contributor:
John Herschel Project