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Newman, W. L. in correspondent 
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From:
W. L. Newman
To:
Sir John Herschel
Date:
[19 September 1844]
Source of text:
RS:HS 13.153
Summary:

Offering hospitality to JH should he attend the B.A.A.S. meeting at York. Has been studying the theory of the manufacture of achromatic telescopes. Comments on the quality of glass available. Swiss seems to be best, though expensive. Deplores the loss of Francis Baily.

Contributor:
John Herschel Project
From:
W. L. Newman
To:
Sir John Herschel
Date:
[24 September 1844]
Source of text:
RS:HS 13.154
Summary:

Glad to hear that there is a possibility that JH will visit York. Another expected visitor will be T. Donkin, brother of Bryan Donkin.

Contributor:
John Herschel Project
From:
W. L. Newman
To:
Sir John Herschel
Date:
[18 February 1845]
Source of text:
RAS: MSS Add.29.1
Summary:

Based on JH's 1821 formula in R.S.P.T., WN calculated aberrations of compound double achromatic object glasses, to be used in determining radii for grinding lenses. Explains theory. Attempting to construct 4.2-inch lens.

Contributor:
John Herschel Project
Collection
Document type
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