Search: Herschel, John in addressee 
1860-1869::1864::12 in date 
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Herschel6715

From:
Gabriel Auguste Daubrée
To:
Sir John Herschel
Date:
[23 December 1864]
Source of text:
RS:HS 6.31
Summary:

Further details about exhibiting samples of the South African meteorite [see GD's 1864-1-3]. [Letter illegible in parts.]

Contributor:
John Herschel Project

Herschel6856

From:
Warren de La Rue
To:
Sir John Herschel
Date:
[12 December 1864]
Source of text:
RS:HS 6.164
Summary:

Has received a letter from Angelo Secchi who states that he has seen James Nasmyth's 'willow leaves.' Remainder of letter relates to the JH prism, which he sent him through Cardinal N. P. S. Wiseman.

Contributor:
John Herschel Project

Herschel7807

From:
James Thomas Walker
To:
Sir John Herschel
Date:
[9 December 1864]
Source of text:
RS:HS 18.15
Summary:

Sent JH 'Index Chart' of Great Trigonometrical Survey of India. Compares five triangulation methods: longitudinal series, George Everest's, G. B. Airy's, that of JH's son John, and minimum squares. JH's son and bride avoided cyclone that destroyed Calcutta Observatory.

Contributor:
John Herschel Project

Herschel7809

From:
James Thomas Walker
To:
Sir John Herschel
Date:
[15 December 1864]
Source of text:
RS:HS 18.17
Summary:

Indian Triangulation chart showed progress to May 1862. Explains why arcs of meridians and parallels were chosen over diagonal braces. G. B. Airy's method of determining errors helped. Will take note and package from Maria [Herschel] to JH's son John.

Contributor:
John Herschel Project

Herschel9367

From:
William J. Edge
To:
Sir John Herschel
Date:
[23 December 1864]
Source of text:
RS:HS 7.119
Summary:

Sending a weather almanac by a person called Orlando Whistlecroft. Comments on his weather forecasting.

Contributor:
John Herschel Project
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