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Dalton, John in correspondent 
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From:
John Dalton
To:
Sir John Herschel
Date:
[1832?]
Source of text:
TxU:H/M-1187; Reel 1060
Summary:

Answers JH's queries on visual perception. Describes trials conducted by JD. Concludes that many people see as JD sees. Sends colored silks submitted by [Richard] Potter to test color vision.

Contributor:
John Herschel Project
From:
John Dalton
To:
Sir John Herschel
Date:
[28 February 1833]
Source of text:
RS:HS 6.466
Summary:

Thanks for sending him his paper on sound. Comments on this and gives some of his own findings on this subject.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Dalton
Date:
[20 May 1833]
Source of text:
RS:HS 25.3.15
Summary:

Having been provided with answers by JD to some questions by JH about color-blindness, JH now comments on them and offers some theoretical considerations.

Contributor:
John Herschel Project