Search: Herschel, John in correspondent 
de La Rue, Warren in correspondent 
1860-1869::1861 in date 
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Herschel6838

From:
Warren de La Rue
To:
Sir John Herschel
Date:
[26 June 1861]
Source of text:
RS:HS 6.148
Summary:

Gives diameter of the sun's image. Used an ordinary eye-piece. There must be some mistake about the penumbra. It is possible now to take daily records of the surface of the sun.

Contributor:
John Herschel Project

Herschel6837

From:
Warren de La Rue
To:
Sir John Herschel
Date:
[24 August 1861]
Source of text:
RS:HS 6.147
Summary:

Sending him his first photograph of the sun's spot. Has caused a lot of preparation. Comments on various points.

Contributor:
John Herschel Project

Herschel6839

From:
Sir John Herschel
To:
Warren de La Rue
Date:
[7 November 1861]
Source of text:
RS:HS 23.346
Summary:

Thanks for pictures of Mars; speculates on the atmospheres of some planets.

Contributor:
John Herschel Project

Herschel6840

From:
Warren de La Rue
To:
Sir John Herschel
Date:
[10 November 1861]
Source of text:
RS:HS 6.149
Summary:

Is pleased that JH likes his plates of Mars. Has a great collection of drawings of Mars but only a few of Venus. Hopes by the Spring to have the photoheliograph working. Has just completed his volume on the eclipse for 1860.

Contributor:
John Herschel Project
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