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Schumacher, Heinrich Christian in correspondent 
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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
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
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
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
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
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
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[11 February 1840]
Source of text:
RS:HS 15.384
Summary:

Asks JH to petition King Christian VIII of Denmark to support the Altona observatory.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[28 February 1840]
Source of text:
RS:HS 15.385
Summary:

Thanks JH for suggesting that the R.A.S. write to King Christian VIII, but requests that JH include his own name and mention Astronomische Nachrichten.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[10 September 1840]
Source of text:
RS:HS 15.386
Summary:

Has been busy with geodetic work. Pulkowa instruments are excellent. [F. W.] Struve has sent zenith distances of Ursa Majores. [G. von] Reichenbach's death dealt blow to precision of Munich instruments.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
[17 January 1841]
Source of text:
RS:HS 15.387 (C: RS:HS 22.77)
Summary:

Discusses a letter in which JH explains why JH cannot, as a British subject, accept the foreign order offered him [by the Danish king]. Asks HS to read over the letter and to decide how it should be delivered.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[22 October 1841]
Source of text:
RS:HS 15.388
Summary:

Has not received parcels from Royal Society. Wants JH to send notice of proposal to Astronomische Nachrichten. Remarks on JH's requiem for William Herschel's large telescope. Asks JH to thank King of Denmark directly for the order conferred.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[24 December 1841]
Source of text:
RS:HS 15.389
Summary:

Asks about the claim that JH professes that the moon affects the atmosphere and about possibly related research. Received paper on constellations for Astronomische Nachrichten.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
1841-[12-25 or later
Source of text:
RS:HS 15.411 (C: RS:HS 22.101)
Summary:

JH replies (to RS:HS 15.389) that neither JH nor his father held that the moon influenced the atmosphere, though JH does connect a full moon with a clear sky. [Eliza] Hamilton, sister of W. R. Hamilton, has published some poetry that is not well known, but deserving. Cannot accept foreign order.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[4 January 1842]
Source of text:
RS:HS 15.390
Summary:

JH's return of order offered him was painful. Will report in Astronomische Nachrichten that JH denies meteorological theory attributed to him and that the 'Wiener Wirtschaftskalender für 1840' is based on JH's authority.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[11 January 1842]
Source of text:
RS:HS 15.391
Summary:

Asks JH to thank King Christian VIII of Denmark for the order, even though JH cannot accept it. Sends a mathematical puzzle.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[30 October 1843]
Source of text:
RS:HS 15.392
Summary:

Saw article in the [London] Times about Lord Rosse's telescope. Has received a letter from [James] South. Asks for information from JH for private use. [Francesco] del Vico has observed triple stars, but HS thinks the telescope by [R. A.] Cauchoix is flawed.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[1 December 1843]
Source of text:
RS:HS 15.393
Summary:

Sends copy of announcement from [Hervé] Faye at Paris observatory of a new comet in Orion. Requests use of JH's letter about double tail on [Halley's] comet in Astronomische Nachrichten. Note from Faye has a gross error in location of comet.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[12 July 1844]
Source of text:
RS:HS 15.394
Summary:

Announces the discovery of a new comet by [Heinrich] D'Arrest, a university student. Wilhelm Struve has seen it.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[10 June 1845]
Source of text:
RS:HS 15.395
Summary:

[J. C.] Houzeau has sent a paper on the determination of parabolic elements of a comet. Relays a copy of his method, which HS will examine more closely before publishing.

Contributor:
John Herschel Project
From:
Heinrich Christian Schumacher
To:
Sir John Herschel
Date:
[23 December 1845]
Source of text:
RS:HS 15.396
Summary:

Announces the discovery of a new 'planet' by [K. L.] Hencke of Prussia, of the class of 'the 4 small ones' [the asteroids].

Contributor:
John Herschel Project