Blood, absorption of digested food by, ix, 226, 243-6; adrenalin effects, 171-2, xi, 137-8; aeration of, by lungs, x, 62, 331; amount in circulation, 337; anemia, 337; arterial, ix, 260, 263, 264; carbon dioxide in, 190, 262-3; effects, 264-7, x, 339; carbon monoxide effects, viii, 50-1; circulation of (see Circulation of the Blood); clotting of, ix, 180, x, 88, 337; coagulation after emotion, xi, 138-9; coloring matter related to Chlorophyll, xii, 14; color of, in relation to oxygen, ix, 259-61; composition, 173-90; control of vital processes by changes in, 168-72; conveyer system, 191, 225; corpuscle-forming tissues, growth of, 287; distribution efficiency, x, 238-9; emergency emotion effects, ix, 166, 171, 293, xi, 136-7; fats in, ix, 289; flow, how controlled, 215-16, 219-21; functions, summarized, 50-1, x, 331-7; germ destruction by white corpuscles, 197, 209-11; in embryo, ix, 343; interchange with tissue, fluids, 51 (fig.), 191, 193-5, 221-2; iron and salts in, uses, viii, 354; liver action on, x, 329; maternal influences through, ix, 343-4; mountain-sickness effects, i, 328; neutrality or alkalinity of, x, 280-1; oxygen supply and transportation, ix, 182-3, 198-9, 253-62, x, 338-9; platelets of, ix, 188-9; proteins of, 176-7, 194-5, 262-3; rate of passage through heart, 210, 211, 212; red corpuscles, 181-4 (see Red Corpuscles); renewal of, 173; sensations, effect on, xi, 68; sleep effects, 283-5, 289; soul in, Greek idea of, xv, 330; sugar in, regulation and excess, ix, 290-3, x, 329, 330; sugar increase in excitement, xi, 138; temperature, v, 348-9; temperature rise, effects, ix, 169, 315-16; transfusion of, x, 337-8; venous, ix, 263-4; waste removal by and from, 271-6; water absorption and supply, 247; white corpuscles, 182 (fig.), 184-8 (see also White Corpuscles) Blood-destroying Germ, x, 221 Blood Heat, i, 319 Blood Pressure, ix, 213-20, x, 334-6; color effects, xi, 63, 96; in sleep, 283-4 Blood Rains, i, 358 Blood Suckers, x, 91 Blood Vessels, ix, 191-3, 196-8; classes and disorders of, x, 334-6; climatic effects on efficiency, 238-9; control of caliber of, ix, 161, 168, 215-16, 219-20, 311; functions of, 50-1; injuries, how mended, 180 Blooms, iron and steel, v, 317, 322 Blowers, electric, vii, 86 Blow Guns, xv, 216-17 (fig.) Blowing Wells, i, 353-5, 368 Blowout, magnetic, vii, 37-9 Blue, complementary color of, iv, 367; in birds' feathers, xii, 245; in interior decoration, vi, 274; of sky, i, 165, penetration of ocean by, xii, 22; wave length of, iv, 365 Blueberries, xiii, 202, 224 "Blue Coal," v, 174 Blue Columbine, xiii, 126-8 Blue-grass Region, xiv, 68 Blue Grotto of Capri, iii, 81