824 



INDEX 



Electrolytes, action of, on colloids, 91 



on emulsoids. 92, 96 



on enzymes, 316 

 on imbibition, 100 



effectof,on dissociation of oxyh.-emoglobin, 



622 



effect of, on staining, 71 



free in cells, 123 



in axis cylinder, 391 



l3'otropic action of, on nerve, 393 



mechanism of action of, on colloids, 



93 



three modes of action of, 183, 214 

 Electrolytic colloids, 89 



dissociation, 170 



in non-aqueous solvents, 232 



source of energy for, 180 



theory, 172 



theory, advantages of, 178, 182 



theory, difficulties of, 178 



solution tension, 190, 191 

 Electrolytically dissociated colloids,. 89 

 Electrometers, 640 



Electromotive force of Malapterurus, 659 



Electron, 122, 170 



Electrostatic attraction of ions, calculation 



of, 179 



Elimination of contact potential, 192 

 Embryogeny, 292 

 Embryonic division, temperature coefficient 



of, 43 



reversion of tissues in vitro, 25 

 Emulsin, optimal reaction for, 205 

 Emulsions, 77 



Emulsoids, 77, 95 



as two liquid phases, 98 



behaviour of, to trivalent ions, 96 

 Enantiomorphic crystals, 283 

 Endogenous metabolism, 267 

 Endothermic reactions, 42 

 End-plate, 399 



Energetics, 27 



of cell oxidation, 593 



Energy absorbed by chlorophyll, 566 



consumption of cell, 32 



factors of, 28 



free and bound, 27 



of food, 247 



of radiation from sun, 548 



required for nitrifying organisms, 253 



source of, in anaerobiosis, 610, 611 



used in cell processes, 32 



value of food, minimum requirement of, 



254 



Entelechy in biology, 202 

 Enterokinase, 374 

 Entropy, 28 

 Enzyme action, adsorption in, 316 



intervention of salts in, 215 



actions, stopping of, 319 



definition of, 307 



Enzyme, disappearance of, 309, 313 



Kiihne's name of, 307 

 Enzymes act at their surfaces, 325 



Armstrong's terminology of, 308 



as by-products, 327 



chemical nature of, 325 



complex systems, 325 



Duclaux' terminology of, 308 



list of, 309 



mode of action of, 325 



necessity of, 240 



physical properties of, 325 



production of, 327 

 Epicritic sensibility, 515 

 Epithelium of lung alveoli, 629 

 Equation of state, 149 



applied to liquids, 149 

 to solutions, 150 



Equilibrium, apparent, in photo-chemical 

 reaction, 554 



constant, 185, 321 



different under enzyme and under acid, 



323 



effect of temperature on, 44 



in ester system, 299 



in glycerol-glucoside system, 299, 300 



in lipase system, 299, 300 



is death, 20, 31 



through cell membrane, 119 



unaltered by addition of enzyme, 309, 



310 



Erepsin, 374 

 Ergastoplasm, 336 

 Ergometer, bicycle, 440 

 Ergotoxine, action of, 728 

 Ewor, truth from, x 

 Esprits animaux, 495 

 Eutectic mixture, 17 

 Evolution of excretory organs, 355 



of temperature regulation, 458 

 Excitation, 377 



at anode, 395 



conduction of, in plants, 431 



in relation to permeability, 138, 398 



polar, 381 



process in muscle, 397 

 Excitability in plants, 429 



of protoplasm, 378 



Excitatory process and electrical change, 



650 



Excretion, 362 



Exogenous metabolism, 267 

 Exponential function, 36 

 Extensor thrust, 501 

 External and internal phases, 75 



phase as dilute solution, 77 

 Extinction coefficient, 550 

 Eye of cephalopod, 516, 524 



of Lizzia, 516 



of Pecten, 516 



of vertebrates, origin of, 516 



