Offers to give CGS a writing machine.
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Offers to give CGS a writing machine.
Pleased CGS will accept machine.
Discusses views of Moritz Wagner on modification of species. Two different cases: one in which a species is modified in the same country and cases in which a species splits. Glad CGS is taking up subject.
Discusses effect of isolation on species modification and the views of Moritz Wagner on the subject.
Gives CGS permission to use his letters in any way he thinks fit.
Discusses the direct effect of external conditions as an agent of change in organisms; has encountered many cases since the publication of Origin.
Thanks CD for his kind letter and accepts his offer of a writing machine.
Thanks CD for writing machine.
Recalls visit by CD’s son [Francis].
Asks whether he may use CD’s letters in his work [Die natürlichen Existenzbedingungen der Thiere (1880)] in order to show that Moritz Wagner has misrepresented CD’s views.
Discusses the influence of isolation and external conditions on animals, and the relative importance of the direct effect of external conditions and of selection in bringing about change.