Factories, fatigue reduction, xi, 277; importance of conditions, 361-2; instruction of beginners, 363-5; lighting importance, 361; rest periods, 363; warm floors, importance of, ix, 320 (see also Industrial Plants, Industrial Psychology) Factory System, beginning of, x, 244; occupational diseases in, 245 Fahrenheit, Daniel Gabriel, iv, 135-6 Fahrenheit Thermometer, i, 73, viii, 27; compared with other scales, iv, 137, 141, viii, 27, 384; invention, i, 69; scale, how prepared, iv, 135-6, 137 Fainting, cause and relief, ix, 217; due to weakness, x, 89; low blood pressure in, 336 Fairmont, W. Va., deep well at, iii, 120, v, 265 Faith Healing, Barton on, x, 76; effectiveness, xi, 374 Falcons, xii, 260, 261; hunting with, xv, 223 Falkland Islands, groundsel of, xiii, 345 Falling Bodies, Galileo's studies of, iv, 19, 28, 97; laws of, 96-7, xvi, 31-3; velocity of, ii, 64, iv, 65; velocity on sun and earth, ii, 168 Falling Stars (see Meteors, Meteorites) Fall Line, xiv, 28, 214 Fallopius, x, 51, 53 Fallowing, viii, 341-2 Fall Winds, i, 132-3, 372 False Cirrus, i, 102, 104, 372 False Coral, xii, 47 Family, origin and evolution of the, xv, 273, 278-85, 360-1, 362 Fancy, pictures of, xi, 202 Fanning, benefits of, ix, 316-17 Farad, electric capacity unit, iv, 284, vii, 368 Faraday, chemical work, xvi, 160, 162, 163; discovery of anesthetics, 185; dynamo invention, 189; electrical work, vi, 16, 21, 22-3, 50; farad named after, iv, 284; metallurgical work, xvi, 174; on lines of force, iv, 252; on philosophers, x, 376; suggestion of fourth state of matter, xvi, 193 Faradic Currents, vii, 243, 248-9 Fargo, N. D., region, iii, 34 Farmers, ancient and recent methods, v, 239-40; motor machines, 214; past injustice and hardships, vii, 220-1; small, and machinery, v, 249-50 Farms, cost of horse work, vii, 224-6; electricity on, iv, 10, vii, 220-34; migration of boys from, 221; motor machines on, v, 214, 215-18 Far-sightedness, ix, 112-13, xi, 85 Fata Morgana, i, 172, 372 Fatigue, xi, 268-80; adrenalin effects, 137; cure for, x, 247-8; disorders and diseases due to, 246-9; from muscles, xi, 124; from posture, ix, 83, 84; habit and, xi, 253; insomnia from, 289; mental and physical, relations, x, 247, xi, 135-6; mental effects, 13; mental effects illustrated, xvi, 18; muscular, cause and effects, ix, 80-1; nervous, 137-8; no sense organs of, 91; physical effects of, x, 246-7; rest periods and, xi, 363; retardation of impulses in, 20; sleep in relation to, ix, 219; smooth muscles free from, 84-5; stimulation to change, xi, 338-9; suggestibility in, 307 Fatness, (obesity), x, 272-5; adipose tissues in, ix, 298; reduction of, 301-2