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Herschel, John in correspondent 
Stevenson, Thomas in correspondent 
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From:
Sir John Herschel
To:
Thomas Stevenson
Date:
[15 June 1860]
Source of text:
NatLibScot MS.785, f.23
Summary:

Thanks TS for TS's publication on lighthouse illumination; adds some of JH's own ideas on the subject.

Contributor:
John Herschel Project
From:
Thomas Stevenson
To:
Sir John Herschel
Date:
[25 June 1860]
Source of text:
RS:HS 17.235
Summary:

Believing JH gives TS credit for a proposal not TS's own, clarifies TS's work in lighthouse illumination.

Contributor:
John Herschel Project