factors determining efficiency of, 50
and fatigue, 62
gross structure of, 36Nervous system, and nutrition, 64
order of development, 60
structural elements in, 34
and worry, 62
Objects, defined through perception, 101
physical qualities of, 87 , 89
Percept, content of, 101
functions of, 103
Perception, chapter on, 98
of direction, 105
function of, 98
nature of, 100
of space, 104
of time, 106
training of, 108
Personality, and habit, 75
influence of, 213
Play, and education, 215
instinct of, 214
and work, 217
Qualities, sensory, auditory, 92
cutaneous, 94
kinæsthetic, 96
objects known through, 85
olfactory, 94
organic, 96