Encloses letter written a week ago. Letter and enclosure speculate on origins of human races in relation to geological and political changes, according to a theory of progressive development.
Was sorry CD wrote so little on man in Origin.
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Encloses letter written a week ago. Letter and enclosure speculate on origins of human races in relation to geological and political changes, according to a theory of progressive development.
Was sorry CD wrote so little on man in Origin.
Gives his speculative thoughts on geographical, political, and biological factors in the origin and development of human races.
Reports having seen a very human-looking monkey on exhibit. Gives a phrenological analysis of its skull.
More speculations [see 5811] on the evolutionary development of man, relating progress to the consumption of better food and the availability of moist air.
Apologises for shortcomings of his argument in earlier letters, explaining he has had little scientific education, but a life-long interest in progressive development. Resumes theorising.
On how various human emigrations have supported the work of natural selection.
Defends the view that soil and air account for taller stature of westerners in U. S.