e human mind from the animal was by
insensible gradations, or by a few sudden leaps, who knows? The animal
brain began to increase in size in Tertiary times, and seems to have
done so suddenly, but the geologic ages were so long that a change in
one hundred thousand years would seem sudden. "The brains of some
species increase one hundred per cent." The mammal brain greatly
outstripped the reptile brain. Was Nature getting ready for man?

The air begins at once to act chemically upon the blood in the lungs of
the newly born, and the gastric juices to act chemically upon the food
as soon as there is any in the stomach of the newly born, and breathing
and swallowing are both mechanical acts; but what is it that breathes
and swallows, and profits by it? a machine?

Maybe the development of life, and its upward tendency toward higher and
higher forms, is in some way the result of the ripening of the earth,
its long steeping in the sea of sidereal influences. The earth is not
alone, it is not like a single apple on a tree; there are many apples on
the tree, and there are many trees in the orchard.

THE END

INDEX

Adaptation, 184, 215, 216.

Alpha rays, 60, 199.

Aquosity, 127, 128, 141-143.

Aristotle, 240.

Asphalt lake, 123.

Atoms, different groupings of, 56-60;
weighed and counted, 60, 61;
indivisibility, 61;
the hydrogen atom, 65;
chemical affinity, 193-195;
photography of, 199, 200;
form, 203;
atomic energy, 204;
qualities and properties of bodies in their keeping, 204;
unchanging character, 205, 206;
rarity of free atoms, 209;
mystery of combination, 210.

Autolysis, 169.

Balfour, Arthur James, on Bergson's "Evolution Creatrice," 15.

Bees, the spirit of the hive, 82.

Benton, Joel, quoted, 70.

Bergson, Henri, 129, 173, 263;
on light and the eye, 5;
his view of life, 14-16, 27-29, 221, 237, 238;
on the need of philosophy, 85, 86;
on life on other planets, 87;
his method, 109, 110;
the key to his "Creative Evolution," 132;
on life as a psychic principle, 162;
his book as literature, 238.

Beta rays, 61, 199, 201.

Biogenesis, 25. _See also_ Life.

Biophores, 217.

Body, the, elements of, 38, 39;
the chemist in, 152, 153;
intelligence of, 153, 154;
a community of cells, 157, 158;
viewed as a machine, 212-214, 224.

Brain, evolution of, 288.

Breathing, mechanics and chemistry of, 50-54, 213.

Brooks, William Keith, q