E
- Earth, internal constitution of, [290].
- Earth's crust, [5]; contraction of, [35].
- Ectoderm social and embryonic, [419].
- Education, bearing of evolution of science upon, [193].
- Emotions in animals, genesis of, [315].
- Emotional language, [232]; importance of, [235], [238].
- Engine, locomotive, results of invention of, [53].
- Equality, origin of notion of, [152],158; of things and relations, [153].
- Evolution of the emotions, [311].
- Evolution of governmental and nervous structures, [420].