1032 



INDEX. 



Elements, metallic: 

 calcium, 967 

 iron, 971 

 magnesium, 970 

 potassium, 963 

 sodium, 965 

 strontium, 970 

 non-metallic : 



bromine, 953 

 carbon, 960 

 chlorine, 951 

 fluorine, 953 

 hydrogen, 943 

 iodine, 953 

 nitrogen, 954 

 oxygen, 944 

 phosphorus, 957 

 silicon, 962 

 sulphur, 949 



Embryo, development of the, 911 

 growth of the cells, tissues, and organs of, 924 

 length and weight of the human, at different 



ages, 924 



nutrition of the, 913 



sex of the, factors determining the, 921-923 

 Emulsification, 245 

 Emulsin, 218, 985 

 Emulsion, 1002 

 Encephalon defined, 717 

 growth of body and, relation between, 727 

 in old age, changes in the, 743 

 nomenclature of, according to weight, 718 

 section of the, functional disturbances follow- 

 ing, 713 



specific gravity of, 716 

 the "stem" of the, 717, 719 

 weight of the, 717 

 at different ages, 726 

 in sane persons, table, 718 

 weights of different portions of, 721 

 Encephalon and spinal cord, weight of, 716. 



See also Brain. 



End-bulbs of sensory nerve-fibres, 835 

 End-organs, nerve, importance of, in cutaneous 



sensation, 839 

 transmission of excitation by, to muscles 



and nerves, 85, 86 

 Endosmosis, 251 

 " Endosmotic equivalent," 251 

 End-plates, motor, 41 

 Enemata, absorption of, 255 

 Energy, body-, influence of inorganic salts on, 



294 



muscular, electrical, amount developed, 135 

 liberation of, 129 

 mechanical, 130 

 thermal, 132 

 source of, 215, 298, 299, 302 

 nerve, specific, 842 

 potential, liberation of, 302-304 



direct and indirect conversion of, into 



heat, 582 

 Enzyme, 176, 944 

 fat-splitting, pancreatic, 244 

 glycolytic, 293 



zymogen and, of pancreatic secretion, 176 

 Enzymes, 217 

 action of the, incompleteness of, 219 



theories of the manner of, 219 

 classification of, 218 

 amylolytic, 218 

 coagulating, 218 

 fat-splitting, 218 

 glucoside-splitting, 218 

 inverting, 218 

 proteolytic, 218 

 urea-splitting, 218 



Enzymes, "diastatic," 218 

 of gastric juice, 226 

 of intestinal secretion, 247, 248 

 of the secretion of the gastric mucous mem- 

 brane, 179 

 pancreatic, 239 

 reaction of, 218 



effect of temperature, 219 



incompleteness of action, 219 



relation of the amount of enzyme to 



the effect it produces, 219 

 solubility, 219 

 Eosinophiles, 345 

 Epiglottis, the, 861, 862 



movements of the, in swallowing, 311 

 Equilibrium, body-, maintenance of, 859, 960. 



See Body-equilibrium. 

 Erythrodextrin, 223, 1007 

 Ether, ethyl, 980 



Ether molecules, rate of vibrations of, 777 

 waves, retinal changes produced by, 777 



synonymous terms used, 777, 778 

 Ethers, mixed, preparation of, 980 

 Ethyl alcohol, 978 

 compounds, 978 

 ether, 980 

 hydroxide, 978 

 Ethylamine, 985 

 Eudiometer, the, 529 

 Eupnoea defined, 548 



Eustachian tube, structure and function, 814 

 Excitation, cardiac, electrical variation in, 454, 



455 



propagation of the, 454 

 in muscle, rate of transmission and direction 



of, 66 



of con traction -wave, 88 



of muscle and nerve, conditions which deter- 

 mine the effect of, 42 

 muscular. See Muscle. 

 nerve, rate of, 122 

 respiratory, due to products of muscular 



activity given to the blood, 552 

 vagus, inhibitory power of, on the heart, 453- 



457 



Excitation-wave, cardiac, 443-446 

 Excitations, muscular, effect of double, 118, 119 

 voluntary, more effective than electrical, 



126 



Excretion, formula of, 260 

 Excretion of COz by the skin, amount, 282 

 Excretions defined, 154 



of the skin, 281 

 Exercise, effect of, 80, 81 

 muscular, effect of preliminary movements 



on, 112 

 heat-production from, amount of energy of, 



132, 133 



promoting endurance and strength of mus- 

 cles, 80 



Exosmosis, 251 

 Expiration, mechanism of, 506 



muscular movements of, 514, 515 

 Extracts, adrenal, physiological action of the, 



210 



testicular, physiological action of, 211 

 thyroid, therapeutic value of, 208, 209, 901 

 Eye aberration, 760, 761 

 accommodation, 752 

 "astigmatic," 755 

 axial, 757, 758 



changes produced by the act of, 755, 757 

 theories of the mechanism of, 755, 756 

 diminished power of, with age, 760 

 for distant objects, 752-758 

 for near objects, 752-758 

 focal, 752-757 



