Thanks HS for his 'highly interesting' paper on the 'Universal Postulate,' which will appear in the Westminster Review.

Thanks for copy of HS’s Principles of psychology [1855].

No summary available.

Thanks for HS’s Essays: [scientific, political, and speculative, vol. 1 (1858)]. Admires his general argument for the development theory.

CD is preparing an abstract on change of species. He treats subject as a naturalist, not from a general point of view. Otherwise he might have quoted HS’s argument to great advantage.

CD particularly liked articles on music and style. Expression is a favourite topic with CD. Agrees all expression is biological.

Sending JH his Essays [Essays: Scientific, Political, and Speculative, 1857] and HS's 'Recent Astronomy and the Nebular Hypothesis,' the latter just published in the Westminster Review. Requests JH's comments on the latter publication.

Thanks HS for sending [see HS's 1859-1-10] HS's Essays and his 'Recent Astronomy and the Nebular Hypothesis.' Regarding the latter, points out a geometrical error, expresses reservations about HS's and Auguste Comte's views of the nebular hypothesis, and argues against HS's theory of sunspot structure. Agrees with HS's idea that some nebulae may be nearer than commonly thought.

No summary available.

[Responding to JH's 1859-1-16,] HS defends the nebular hypothesis, HS's theory of comets, and sets out HS's theory of sunspot formation, noting that John Tyndall supports it.