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From:
James Challis
To:
Sir John Herschel
Date:
[1 April 1869]
Source of text:
RS:HS 5.242
Summary:

Is pleased with the interest JH is taking in his volume. Understands the difficulty of comprehending it at once. Further comments on his own dynamical theory of dispersion.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
George Robert Waterhouse
Date:
[1 April 1869]
Source of text:
RS:HS 18.107 (C: 24.255)
Summary:

Thanks for answers and for notice on Apteryx [Maerurus ?], which JH remembers watching Richard Owen inspect. Interested in W. B. Carpenter's and C. W. Thomson's ['Bathybius?]' as origin of chalk-flint. Discusses inorganic chemical allotropes. Organic allotropes may exist, serving as 'agents of vital action' and subject to a higher power.

Contributor:
John Herschel Project