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Perigal, Henry in correspondent 
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From:
Henry Perigal
To:
Sir John Herschel
Date:
[6 May 1839]
Source of text:
RS:HS 13.364
Summary:

A note accompanying some machine-made mathematical curves.

Contributor:
John Herschel Project
From:
Henry Perigal
To:
Sir John Herschel
Date:
[17 August 1839]
Source of text:
RS:HS 13.365
Summary:

More mathematical curves made by machine [see HP's 1839-5-6].

Contributor:
John Herschel Project
From:
Henry Perigal
To:
Sir John Herschel
Date:
[28 January 1840]
Source of text:
RS:HS 13.366
Summary:

Invites JH to visit HP to see the machine drawings being made [see HP's 1839-8-17].

Contributor:
John Herschel Project
From:
Henry Perigal
To:
Sir John Herschel
Date:
[29 February 1840]
Source of text:
RS:HS 13.367
Summary:

More on machine-made curves [see HP's 1840-1-28].

Contributor:
John Herschel Project
Collection
Document type
Transcription available