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1860-1869::1863::02::23 in date 
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From:
Adolphe Quetelet
To:
Sir John Herschel
Date:
[23 February 1863]
Source of text:
RS:HS 14.255 (ALS?: Académie belgique #28)
Summary:

Cruel illness has kept him from work for a while. Just finished Histoire des sciences mathématique et physique chez les belges. AQ's son works with proper motion, double and multiple stars, and absolute positions.

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[23 February 1863]
Source of text:
RAS:JH Archive 12/1.1.12; Reel 10
Summary:

Sends copy of G. F. J. A. von Auwers's catalog of JH's and William Herschel's nebulae. Observatory has another copy. Notes odd lines seen in 'Refraction Spectra of 11 stars.'

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[23 February 1863]
Source of text:
RAS:JH Archive 12/1.1.15; Reel 10
Summary:

Refraction spectra of six stars exhibit lines corresponding with 'Solar Line F.'

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[23 February 1863]
Source of text:
RAS:JH Archive 12/1.1.16; Reel 10
Summary:

Expect some errors in calculations of positions for JH's catalogue of nebulae. Suggestions on format.

Contributor:
John Herschel Project
From:
Alexander Wylie
To:
Sir John Herschel
Date:
[23 February 1863]
Source of text:
RS:HS 19.304
Summary:

Recalls translating Outlines Astr. into Chinese. Wishes to visit JH before returning to China.

Contributor:
John Herschel Project
From:
Alexander Wylie
To:
Sir John Herschel
Date:
[23 February 1863]
Source of text:
RS:HS 19.305
Summary:

Heard of JH's 'domestic affliction.' Postpones visit till next week.

Contributor:
John Herschel Project