Search: Herschel, John in correspondent 
1870-1879::1870::04 in date 
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Herschel2619

From:
William Selwyn
To:
Sir John Herschel
Date:
[25 April 1870]
Source of text:
RS:HS 15.507
Summary:

Is sending solar autographs. Notes that in groups of spots the larger precede the smaller spots. Can JH form any theories from this?

Contributor:
John Herschel Project

Herschel2620

From:
William Selwyn
To:
Sir John Herschel
Date:
25?] April? [1870
Source of text:
RS:HS 15.517
Summary:

Detached postscript that discusses the margins of the two photographs, which seem to show that all planets are in the near hemisphere.

Contributor:
John Herschel Project

Herschel10657

From:
Henry Hudson
To:
Sir John Herschel
Date:
[26 April 1870]
Source of text:
RS:HS 10.30
Summary:

Would like him to accept the enclosed paper on the cause and effect of dew. Comments on various points.

Contributor:
John Herschel Project

Herschel10932

From:
Henry James
To:
Sir John Herschel
Date:
[26 April 1870]
Source of text:
RS:HS 10.278
Summary:

The volumes of the Sinai photographs will be dispatched tomorrow. The cost of the survey has been covered by subscriptions and he will forward a statement of the account later.

Contributor:
John Herschel Project

Herschel10649

From:
Frederick Howlett
To:
Sir John Herschel
Date:
[28 April 1870]
Source of text:
RS:HS 10.23
Summary:

Has no idea whether the sunspots appeared suddenly or gradually. The Kew people may be able to help in this matter. Comments on some more sunspots.

Contributor:
John Herschel Project

Herschel9350

From:
Georg Adolph Erman
To:
Sir John Herschel
Date:
[28 April 1870]
Source of text:
RS:HS 7.104
Summary:

Sends two of his publications, one on terrestrial magnetism at Berlin. Comments on the results, and wonders if JH would enlist the help of the B.A.A.S. to finance further studies by H. J. R. Petersen.

Contributor:
John Herschel Project

Herschel1607

From:
Sir John Herschel
To:
Edward Sabine
Date:
[28 April 1870]
Source of text:
Cambridge University Library 7656/H727 (C: RS:HS 24.307)
Summary:

Comments on the effect of great temperature variations on the speculum of a telescope.

Contributor:
John Herschel Project

Herschel3448

From:
Sir John Herschel
To:
Edward Sabine
Date:
[28 April 1870]
Source of text:
RS MC.9.63 (C: RS:HS 24.308)
Summary:

ES has been forwarded letter explaining why 'great telescope' at Melbourne will not work and suggesting construction corrections, on which JH, who believes such 'a priori condemnation' unjustified, comments herein.

Contributor:
John Herschel Project

Herschel8730

From:
Richard Anthony Proctor
To:
Sir John Herschel
Date:
[30 April 1870]
Source of text:
RS:HS 14.122
Summary:

Sends map from his new atlas. Reports finding a region rich in bright stars in the northern hemisphere but distinct from the Milky Way. States that in a Royal Institution lecture, he will claim that telescopes cannot reach the limits of the sidereal system and that it is far more complex than traditionally assumed.

Contributor:
John Herschel Project

Herschel2621

From:
Sir John Herschel
To:
William Selwyn
Date:
[30 April 1870]
Source of text:
RS:HS 24.309
Summary:

Is returning March heliographs. Discusses the appearance of the spots. Has not received the April heliographs.

Contributor:
John Herschel Project

Herschel6864

From:
Warren de La Rue
To:
Sir John Herschel
Date:
[30 April 1870]
Source of text:
RS:HS 6.171
Summary:

Has just learnt that some negatives were sent to his former place of residence. Will forward them when he goes to the City. A vote has been made from the Donation Fund of the R.S.L. for six copies of the Kew Solar negatives.

Contributor:
John Herschel Project
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