INDEX 



Neurone, structure and properties of, 469 

 Neurones, no increase of, after birth, 469 



structural discontinuity of, 474 

 Neuropile, 466, 472 



Neutral salt action, 182, 195, 230 



salts, relation of, to proteins, 104 

 Neutrality preservation, 195 

 Newton's law of cooling, 35, 157 

 Nicotine, 400 



action of, 727 



and adrenaline secretion, 713 

 Nissl bodies, 17, 470 



staining of, 71 



substance in fatigue, 16 

 Nitragin, 253 



Nitric acid from the atmosphere, obtaining 



of, 253 

 Nitrifying organisms, 253 



source of energy for, 253 

 Nitrogen cycle, 250 



fixation by leguminosaj, 252 



fixing bacteria, 251 



minimum, 267 



Hindhede's work, 268 



Nociceptive reflexes, 501, 505 

 Nocuous stimuli, 510 ' 

 Non-oxidation of protoplasm, 18 

 Non-polarisable electrodes, 381 

 Nucleins, 259, 270 



Nucleus, relation of, to oxidation, 591 

 Number of nerve fibres to eye muscles, 389 

 of stimuli as factor in sensation, 514 

 Nutrition, influence of nerves on, 288 



Obligatory anaerobiosis, 610 



(Edema, 100, 115 



Old age, 328 



Olfactory nerve, primitive state of, 469, 511 



Oligodynamic action, 108, 222 



action of calcium on, 222 

 Omission, necessity of, x 

 Opsonic index, 3 

 Opsonins, 68, 366, 733 

 Optical activity, 282 



due to asymmetric forces, 285, 286 



meaning of, 285 



of food-stuffs, 249, 285 



antipodes, 283 



isomers both utilised, 285, 329 

 -, partial, 284 



separation of, 285, 286 



lever, 441 



sensitisation, 555 



Optimal energy in relation to ions, 401 

 of stimuli, 400 



incidence of energy to nerve, 383 

 Optimum temperature, 318 



Optograms, 521 



Organ of Corti, 526 



Organic chemistry, importance of, 41, 325 



ions, rate of migration of, 177 

 Organisms and the second law of energetics, 



87 



-- units in time, 3 

 Origin of heart beat, 678 



of nervous system, 464 



of potential differences, 643 

 Oscillograph, 640 



Osmometer of Moore and Roaf, 162 

 Osmosis in cells, 118 

 Osmotic pressure, 146 



and adsorption, 167 



and cell processes, 162 



and velocity of reaction, 156 



applied to haemoglobin system, 624 



cause of, 152 



effect of hydration on, 152, 236 



effect of, on reaction to drugs, 163 



formula of Stern for, 150 



Fouard's method of measurement of, 152 



kinetic theory of, 148 



logarithmic formula for, 148 



measurement of, 152 



of blood of marine organisms, 165 



of blood, regulation of, 165 



of cane-sugar solutions, 148 



of colloids, 158 



of colloids in absence of electrolytes, 159 



of Congo-red and dyes, 160, 161 



of fatigued muscle, 447 



of nitrogen in carbon dioxide, 146 



of serum colloids, 159 



of solutions of a gas, 151 



produced by iinequal rate of diffusion, 



158 



use of name, 166 



van't Hoff's theory of, 147 



work, 156 

 Ostwald, portrait of, 321 

 Ostwald's dilution law, 181, 186 

 Otocysts, 527 



Outflow recorder, 688 

 Ovary, internal secretion of, 714 

 > transplantation of, 714 

 Oxidase, 585 

 Oxidation, 580 



in mushrooms in absence of oxygen, 611 



nature of, shown by Lavoisier, 606 



potential, 580 

 of organs, 594 



system of cell, 589 



theory of narcosis, 609 

 Oxidative removal of lactic acid, 447 

 Oxygen as food, 247 



consumption after asphyxia, 608 

 by glands, 342, 343 



in formation of structure, 591 



in muscle recovery, 445 



