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1860-1869::1863::02 in date 
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From:
Edward Sabine
To:
Sir John Herschel
Date:
[2 February 1863]
Source of text:
RS:HS 15.267
Summary:

Wrote to [A.] Sawitsch regarding Russian pendulum experiments. Encloses Sawitsch's reply. Discusses experimental possibilities.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Sabine
Date:
[5 February 1863]
Source of text:
RS:HS 24.8
Summary:

Agrees that the pendulum should be observed at major Indian stations because Russians did not avail themselves of offered vacuum apparatus and pendulums.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
[17 February 1863]
Source of text:
RS:HS 15.268
Summary:

Sends [Warren] de La Rue's letter on Southern[?] Telescope for JH's review. Swedish Academy working on reviving project of measuring arc of meridian.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Sabine
Date:
[22 February 1863]
Source of text:
RS:HS 15.269 (C: RS:HS 24.11)
Summary:

Returns [Warren] de La Rue's letter and discusses its contents, especially the making, mounting, and mirror for de La Rue's reflecting telescope.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Sabine
Date:
[22 February 1863]
Source of text:
RS:HS 15.270 (C: RS:HS 24.12)
Summary:

Expresses interest in Swedish plan to survey Spitzbergen and to measure meridian of arc. Discusses gravitometer being developed by [Jacques] Babinet.

Contributor:
John Herschel Project