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Herschel, John in correspondent 
McCullagh, James in correspondent 
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From:
James McCullagh
To:
Sir John Herschel
Date:
[23 August 1831]
Source of text:
RS:HS 12.9
Summary:

Sending some papers that will appear in the Irish Transactions, on the intensity of light. If JH agrees would he send it on to one of the scientific journals.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
James McCullagh
Date:
[27 June 1846]
Source of text:
RS:HS 12.10 & 22.274
Summary:

Has just received his remarkable paper on the dynamical theory of crystalline reflection and refraction. Comments on this. The subject has not lately occupied his attention. Would like clarification on some points.

Contributor:
John Herschel Project
From:
James McCullagh
To:
Sir John Herschel
Date:
[2 October 1846]
Source of text:
RS:HS 12.11
Summary:

Has been on the Continent, which accounts for the delay replying to JH's letter of June. Regrets he cannot give an answer to JH's queries regarding the constitution of the ether. Fears his hypothesis on the density of the ether is not clear as it has misled JH. Has read Michael Faraday's papers with eagerness.

Contributor:
John Herschel Project