Chapter VII

. Critics Of Darwinism.

Lamarckism and Neo-Lamarckism. Theory of Definite Variation. De Vries’s Mutation-theory. Eimer’s Orthogenesis. The Spontaneous Activity of the Organism. Contrast Between Darwinian and Post-Darwinian Views.

## Chapter VIII . The Mechanical Theory Of Life.

The Conservation of Matter and Energy. The Organic and the Inorganic. Irritability. Spontaneous Generation. The Mechanics of Development. Heredity.

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