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Whewell, William in correspondent 
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From:
William Whewell
To:
Sir John Herschel
Date:
[19 June 1818]
Source of text:
RS:HS 18.159
Summary:

Informs JH of the place of Simon Stevin in the history of the idea of a parallelogram of forces. Has heard that JH is investigating polarized rays.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Whewell
Date:
[12 August 1818]
Source of text:
TxU:H/L-0496; Reel 1055
Summary:

Grateful for WW's comments on investigations of [Simon] Stevin. JH's work on polarization of light. Discovery of multiple axes of polarization was preempted by David Brewster. Diagrams polarization of niter crystals and Iceland spar.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Whewell
Date:
[19 August 1818]
Source of text:
TC, Camb. Add. Ms.a.2074 (C: RS:HS 20.56)
Summary:

Thanks WW for and expresses agreement with WW's analysis of Simon Stevin. Describes experiments JH is conducting on the polarization of light.

Contributor:
John Herschel Project
From:
William Whewell
To:
Sir John Herschel
Date:
[1 November 1818]
Source of text:
RS:HS 18.160
Summary:

Expresses thanks for and comments on JH's account of JH's optical experiments. Discusses efforts to improve mathematical education at Cambridge, including WW's book on mechanics.

Contributor:
John Herschel Project