From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
4 Dec [1857]
Source of text:
DAR 114: 216
Summary:
Inquiries on effect of dry heat on temperate plants for glacial chapter.
Contributor:
Darwin Correspondence Project
Inquiries on effect of dry heat on temperate plants for glacial chapter.
Survey of species with well-marked varieties: JDH’s Labiatae case a "great blow", but result is very generally consistent.
Species with marked varieties.
Dana’s pamphlet also too metaphysical for CD.
Natural selection chapter on hybridism completed.
Doubts JDH will resist theory in his introduction to Flora Tasmaniae.