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1860-1869::1864::06::01 in date 
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Herschel14594

From:
Sir John Herschel
To:
[Edward Sabine?]
Date:
[1864-6]
Source of text:
TxU:H/M-0579.2; Reel 1093
Summary:

Pendulum experiments are already approved at principal stations in Russian trigonometrical survey. Recent communication from J. H. Pratt to R.S.L. about pendulum observations.

Contributor:
John Herschel Project

Herschel6846

From:
Warren de La Rue
To:
Sir John Herschel
Date:
[1 June 1864]
Source of text:
RS:HS 6.154
Summary:

Agrees with him that J. Müller's drawings do not show the entities around the sunspot clearly. Has nearly completed the apparatus for holding one of JH's sun prisms to his reflector. Hopes to do something with it soon.

Contributor:
John Herschel Project
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