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Showing 18 of 8 items

From:
William Selwyn
To:
Sir John Herschel
Date:
[1870]
Source of text:
RS:HS 15.513
Summary:

Thanks JH for drawing of solar maculae from 1854-61. Some hesitancy about the accuracy of [Alexander?] Wilson's observations and hypotheses. Sixty people wish to travel to Spain to see eclipse of the sun.

Contributor:
John Herschel Project
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
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
From:
William Selwyn
To:
Sir John Herschel
Date:
[11 May 1870]
Source of text:
RS:HS 15.508
Summary:

Desires permission to present JH's 'diagram of "macularity"' to the R.A.S.

Contributor:
John Herschel Project
From:
William Selwyn
To:
Sir John Herschel
Date:
[11 June 1870]
Source of text:
RS:HS 15.509
Summary:

Discusses the different strata of the ocean and [William] Carpenter's lecture on deep sea dredging. Is digging an artesian well.

Contributor:
John Herschel Project
From:
William Selwyn
To:
Sir John Herschel
Date:
[16 June 1870]
Source of text:
RS:HS 15.510
Summary:

Sends two copies of JH's 'macular conspectus.' Mr. Titterton was very pleased that JH approved of his work.

Contributor:
John Herschel Project
From:
William Selwyn
To:
Sir John Herschel
Date:
[24 June 1870]
Source of text:
RS:HS 15.511
Summary:

Thanks JH for the drawings. Will send new solar autographs showing macula. Is working on the autographic series of the activity of the sun during its 11 year period.

Contributor:
John Herschel Project
From:
William Selwyn
To:
Sir John Herschel
Date:
[2 September 1870]
Source of text:
RS:HS 15.512
Summary:

Has been trying to make pendulum curves. Believes they may help explain the different sunspot forms. Thanks JH for the spectroscopic observation memoirs.

Contributor:
John Herschel Project