I. Further considerations which oppose Nägeli’s 298 explanation of Transformation as due to internal causes
II. Nägeli’s Explanation of Adaptation 300
III. Adaptations in Plants 308
IV. On the Supposed Transmission of Acquired 310 Characters
1. Brown-Séquard’s experiments on Guinea-pigs 310
2. A case which at first sight appears to prove 320 the transmission of acquired characters
V. On the Origin of Parthenogenesis 323
VI. W. K. Brooks’ Theory of Heredity 326
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