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From:
Thomas Grubb
To:
Sir John Herschel
Date:
[17 April 1839]
Source of text:
TxU:H/M-1194; Reel 1060
Summary:

Encloses description of two magnetometers approved by Humphrey Lloyd, and proposes to make these for £70.

Contributor:
John Herschel Project
From:
Thomas Grubb
To:
Sir John Herschel
Date:
[1 December 1859]
Source of text:
Harvard: Houghton AAH 67m-67 (48)
Summary:

Discusses his efforts making reflecting telescopes.

Contributor:
John Herschel Project
From:
Thomas Grubb
To:
Sir John Herschel
Date:
[6 December 1859]
Source of text:
Harvard: Houghton AAH 67m-67 (48)
Summary:

Informs JH which observatories received the object lenses from his workshops.

Contributor:
John Herschel Project
Document type
Transcription available