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DCP-LETT-3216

From:
Charles Robert Darwin
To:
Asa Gray
Date:
21 July [1861]
Source of text:
Gray Herbarium of Harvard University (61)
Summary:

Is writing his paper on orchids.

Is surprised that AG gets little or no response with Drosera.

Describes the two forms of Primula and asks whether AG knows any analogous cases of dimorphism.

Reports that John Stuart Mill approves of CD’s scientific method.

Discusses American politics.

Contributor:
Darwin Correspondence Project

Herschel10975

From:
William Stanley Jevons
To:
Sir John Herschel
Date:
[21 July 1861]
Source of text:
RS:HS 10.319
Summary:

Sending two papers he published some years ago, which agree with JH's theories regarding clouds. JH does not appear to know of their existence.

Contributor:
John Herschel Project

Herschel3396

From:
Sir John Herschel
To:
John Tyndall
Date:
[21 July 1861]
Source of text:
RS:HS 23.335 (ACCS: RS:HS 17.388a; C: RI 505-6)
Summary:

Thanks for and comments on paper and lectures on 'diathermancy &c' of gases, scientific teaching, and solar chemistry. Regrets that JT mentioned all names connected with light research except JH's. Remarks on absorption of light, molecular vibrations.

Contributor:
John Herschel Project

Tyndall1796

From:
John Frederick William Herschel
To:
John Tyndall
Date:
July 21 1861
Source of text:
MS JT/1/H/94; MS JT/1/TYP/2/505-6, RI
Summary:

No summary available.

Contributor:
Tyndall Project
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