bryonic life, 27, 166

Empirical study of evolution the centre of the theory of knowledge and of
the theory of life, 178
theories of knowledge, 205

Empty, thinking the full by means of the empty, 273-4

End in Eleatic philosophy, 314-5
of science is practical utility, 329

Energy, 115-7, 120-3, 242, 243, 245, 246, 252-5, 256, 257, 262
conservation of, 242
degradation of, 242, 243, 246
solar, stored by plants, released by animals, 245, 254

Enneadae of Plotinus, 210 _note_

Entelechy of Driesch, 42 _note_

Entropy, 243

Environment in evolution, 129, 133, 138, 140, 142, 150, 167, 168, 170,
192, 193, 252, 256, 257
and special instincts, 138, 168, 192, 193

Epiphenomenalism, 262

Essence and accidents in Aristotle's philosophy, 353
or form in Eleatic philosophy, 314-5
the meaning of, 302-3

Essences (or forms), qualities and acts, the three kinds of
representation, 303-4

Eternity, 39, 298, 314, 317, 320, 324, 328, 346, 352, 354
in the philosophy of Ideas, 316-7, 319, 324, 328
in Spinoza's philosophy, 353

Euglena, 116

Evellin, 311 _note_

Eventual actions, 11, 96.
_See_ Possible activity

Evolution, ix-xv, 18, 20, 22, 24, 25, 26-7, 37, 46-55, 63, 68, 79
_note_, 84-8, 97-105, 107, 113, 116, 126, 127, 129-30, 131-2,
133, 134, 136, 138-40, 141-2, 143, 161, 166, 167, 168-72, 173, 174,
175, 179, 181, 182, 185, 186, 190, 193, 198-9, 207-8, 224, 231, 242
_note_, 246, 248, 249, 251, 252, 254, 264-6, 268, 273, 302, 311,
345, 359, 360, 366
accident in, 104, 169, 170, 173, 174, 251, 252
animal, a progress toward mobility, 131
antagonistic tendencies in, 103, 113, 185
automatic and determinate, is action being undone, 248
blind alleys of, 129
circularity of each special, 128
complementarity of the divergent lines of, 97-102, 103, 116
conceptually inexpressible, 49, 50, 52, 53, 127, 181, 273
continuity of, 18, 19, 26, 37, 46, 273, 302, 312, 345
creative, 7, 15, 21, 27, 30, 36, 37, 65, 100, 105, 161, 162, 163, 223,
230, 238, 264, 269
culminating points of, 50, 133, 174, 185, 265, 266, 268
development by, 133, 134, 141-2
divergent lines of, xii, 53, 54, 87, 97-101, 103-4, 107, 173-4, 246
and duration, 20, 22, 37, 45-6
empirical study of, the centre of the theory of knowledge and of life,
178
and environment, 101-3, 129, 133, 138, 142, 150, 167, 168, 169, 192,
193, 251, 256, 257
of instinct, 170, 171, 174-5.