Chapter V: Development

Nature of inquiry stated, 154 158

_Chemical development_—
Changes in lists of elementary substances, 155 159
Prout’s speculations, 156 160
Experiments of M. Stas, 156 160
Family groups, 157 161
Mr. Lockyer’s speculations, 158-159 161

_Globe development_—
Hypothesis of Kant and Laplace, 160 163
Tendency to aggregation of mass, 161-162 164
Process cannot have been going on for ever, 163 166
Peculiarity of products developed inorganically, 164 167

_Life development_—
Morphological and physiological species, 165 168
Species regarded physiologically, 166 170
Position of a certain class of theologians, 167 171
Tendency to minor variations, 168 172
Artificial selection, 169 174
Natural selection, 170 175
Unproved point in the Darwinian hypothesis, 171 175
Remarks of Mr. Darwin, 172 177
Development of the Darwinian hypothesis, 173 177
Mr. Wallace’s views, 174 178
Professor Huxley’s remarks, 175 178
Position assumed by the authors, 176 179