Cheselden, William, x, 92, 123 Chest, diseases, studies of, x, 110, 112; examination methods, 98-9, 108-9, 371, 373; fixation of, 304-5 Chestnut Trees, family of, xiii, 193; in American forests, xiv, 373 Chevrotains, xii, 313 Chewing, act of, ix, 82; importance of, 227-8, 229, 230 Cheyne-Stokes Respiration, x, 340 Chiasmodus, xii, 24 Chicago, growth due to railways, xiv, 219; level changes at, iii, 82; sewage of, viii, 326; terminals, electrification, vi, 162; underground trolleys, vii, 12; ventilation standards, viii, 332 Chicago Fire, dust from, i, 56 Chicago, Lake, iii, 148, 149 Chickadees, xii, 268 Chicken Cholera, inoculation for, x, 141-2, 208 Chicken Pox, immunity to, x, 207 Childbirth, among savages, xv, 278 Child Labor, factory system and, x, 244; laws, remarks on, vii, 33 Children, adenoids in, ix, 224, x, 341-2; artistic impulse in, xv, 296; basal metabolism in, x, 271; bones of, ix, 56, 57; care in development of, 352; care of, by state, xv, 290-1; choice importance to, xi, 266-7; clothes for, x, 308; cold baths for young, 312; convulsions in, ix, 133-4; cretinism in, x, 349-50; darkness effects on, 253; dreams of, xi, 293; ear troubles in, ix, 104; education and environment importance, 344, 352; exhaustion in, xi, 273; foods for, ix, 33-4, 242, 295, x, 314-15; grasping reflex, importance, xi, 43; growth period, ix, 47-8; habit acquisition, xi, 247, 249; habit of evacuation in, ix, 252; heart rate in, x, 334; house-breaking, xi, 251-2; imitation in, xv, 66-7; language of, 142-3, 153; malnutrition causes, ix, 228; objection to sour tastes, 95; relationships under polyandry, xv, 286, 294; resemblance to parents (see Heredity); savage attitude towards, 135, 195, 198; skull growth in, 40; soaps desirable for, x, 311; suggestibility, xi, 307; teeth, care of, ix, 228, x, 312-16; transmission of nonhereditary characters to, ix, 343-4; walking of, on what dependent, 351 Chile, Bolivia and, xiv, 306; climate of, 358, 371; coasts, 258, 265; deserts of northern, xiii, 377; nitrate fields, i, 34, 35, viii, 64, 72, 197, 280, xiv, 66; temperate forests, xiii, 372 Chilled Iron, v, 241 Chilling, of body, x, 252-3, 306, 311; effects, ix, 323 Chimborazo, Mount, formation, xiv, 225; observatory site, ii, 149-50 Chimpanzees, xii, 383-4; brain of, xv, 62 (fig.), 96; expression of passion by, 65; hand and foot in, 58-60; mandible of, 94; reasoning power in, 67-8; skeleton compared to man's, 59