Fats, amount in daily diets, viii, 366-7, ix, 300-1; animal, viii, 246, 348, 349, 350, x, 260; animal, vitamines in, ix, 33; calories in, viii, 361, x, 269; composition, viii, 221, 245, 247, 335-6, 376; digestion and utilization, 356, 357, 359, ix, 242-3, 244-5, 289-90, 294, 298-9, x, 326, 330; extraction of, viii, 246; food value and requirements, 335, 336, 362, 363, ix, 33, 300-1, x, 256, 260-2, 268, 269, 271; identification of, viii, 310; indigestibleness of, ix, 286; in human body, viii, 348, 349; lipins, 350-1; liquid and solid, 232, 244, 247 (see also Oils); metabolism of, x, 270; molecular structure, viii, 217-18; not antigens, x, 205; preserving of, viii, 371; skin excretions, x, 310; soap effects on, viii, 141-2; soap made of, 141, 221, 246; tastelessness, 366; uses, 246-7; vegetable, 246, 335-6, 349, 350; vegetable, lack of vitamines in, x, 259, 260-1, 262 Fatty Acids viii, 220; butter percentage, 245, 364; candles made from, 247; in fats and oils, 221, 244, 245; soap made from, 221, 246 Faults, Faulting, iii, 86-92, 378, xiv, 37-8, 114-28; coasts formed by, 264; earthquakes and, iii, 87, 90, 93, 94-6, 97, 98, xiv, 39, 115, 128, 334-5, 339-41; greatest displacement, 39; hot springs in relation to, 143; lakes formed by, iii, 151, 152, 153; mountains formed by, 138-9, xiv, 226, 229, 230 Fault Scarps, iii, 378, xiv, 38; denudation of, 115-16; persistency of, 122, 123, 124 Fault Valleys, xiv, 127-8 Fear, cause and accompaniments of, ix, 153, 166, xi, 131-3, 136, 138; dominant human impulse, xv, 185; dreams from, xi, 293, 294, 299-300, 301-2; expression of, in animals, xv, 64; in various sentiments, xi, 146, 147, 148; pain deadened by, 120; subconscious processes and, 212-13, 214 Feathers, of birds, xii, 243-7 Feeble-mindedness, inheritance of, x, 234, 235-6; reflex action in, xi, 36 Feelings, brain processes in, ix, 154; classes of, 153-4; essentials of, xi, 25; expression of, xv, 143; motor response and, xi, 43 (see Consciousness, Emotions, Sensations) Feet, bones of, ix, 68-9, 70 (fig.); care of, x, 312; Chinese women's, xv, 260, 261 (fig.); cold or warmth felt in, ix, 320, 322; custom of covering, xv, 254; equal size of, ix, 170; mental impairment by troubles with, xi, 373; of ape and men, compared, iii, 301 (fig.), xv, 57, 60-1; of infants, 61; of Tertiary mammals, iii, 298, 299-300; proper shoeing, ix, 69-70, x, 306; relative lengths, xv, 57; soles of, nerve connections, ix, 132, 135; uses of, by men and monkeys, xv, 60-1; wetting of, and colds, x, 239, 306, 341 Feldspar, iii, 308, 328-9; chemical composition, viii, 90, 193; clay from, iii, 25, 27, 28, 373; disintegration, viii, 194; potash in, 201