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Schumacher, Heinrich Christian in correspondent 
1830-1839 in date 
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Herschel2883

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[18 June 1832]
Source of text:
RS:HS 15.374
Summary:

Sends news of a cholera epidemic to help JH make his summer plans. Mentions a number of new cases from Altona, Hamburg, and Berlin. Asks JH not to spread information.

Contributor:
John Herschel Project

Herschel2884

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[22 June 1832]
Source of text:
RS:HS 15.375
Summary:

Sends two bottles of Claret and a box to be forwarded for [Francis] Baily.

Contributor:
John Herschel Project

Herschel1055

From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
[24 February 1835]
Source of text:
RS:HS 25.4.8
Summary:

Describes JH's location at the Cape and his observational sweeps, lists nebulae and double stars, as well as comet and eclipse observations. [Letter finished on 1835-3-5.]

Contributor:
John Herschel Project

Herschel2885

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[5 March 1835]
Source of text:
RS:HS 15.376
Summary:

[Otto] Rosenberger has calculated perturbations of Halley's Comet by the inner planets. [Wilhelm] Beer and [J. H.] Mädler have a map of the moon and have located two moving spots on Jupiter. F. W. Bessel's assistant has reduced James Bradley's observation to constants of aberration and nutation.

Contributor:
John Herschel Project

Herschel2886

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[9 July 1835]
Source of text:
RS:HS 15.377
Summary:

Visits F. W. Bessel in Berlin to discuss pendulum experiments. [C. A.] Steinheil invented a photometer to measure relative light of different stars.

Contributor:
John Herschel Project

Herschel2887

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[17 July 1838]
Source of text:
RS:HS 15.378
Summary:

Received JH's note from Belvedere Hotel. Mentions various arrangements regarding JH's European journey, including JH's planned visit to Wilhelm Olbers.

Contributor:
John Herschel Project

Herschel2888

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[19 July 1838]
Source of text:
RS:HS 15.379
Summary:

Unless other responsibilities interfere, HS will meet JH in Bremen.

Contributor:
John Herschel Project

Herschel2889

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[24 July 1838]
Source of text:
RS:HS 15.380
Summary:

In compliance with JH's request, HS did not go to Bremen to meet JH. Hopes JH will visit him in Altona and stay at his house.

Contributor:
John Herschel Project

Herschel2890

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[3 August 1838]
Source of text:
RS:HS 15.381
Summary:

Asks if he can publish the finding that the star in Argo is dimming in Astronomische Nachrichten. Questions whether barometric information should be in feet or yards. Asks JH about a publication that HS and [Alexander von] Humboldt are planning.

Contributor:
John Herschel Project

Herschel2891

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[19 January 1839]
Source of text:
RS:HS 15.382
Summary:

Forwards a request from C. F. Gauss for magnetic observations made in England.

Contributor:
John Herschel Project

Herschel1063

From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
[19 January 1839]
Source of text:
RS:HS 25.5.11
Summary:

Compares magnitudes for some specific stars and then comments more generally on that question; JH believes he will no longer be able to observe in winter in England as he is too severely afflicted by rheumatism.

Contributor:
John Herschel Project

Herschel8696

From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
[7 February 1839]
Source of text:
NSUB Cod.Ms.Gauss 110
Summary:

Sends HS's observations of magnetic declination and dip near London for forwarding to Carl F. Gauss. Encloses a letter from Edward Sabine.

Contributor:
John Herschel Project

Herschel2892

From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[12 February 1839]
Source of text:
RS:HS 15.383
Summary:

Asks permission to use information from JH's letter in Astronomische Nachrichten. Believes [Alexander von] Humboldt can explain observational anomalies that JH notes.

Contributor:
John Herschel Project
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