INDEX 755 



Nerve of animal, mechanical response of, effect of morphia on, 516 



,, ,, ,, ,, ,, of tetanising electric shocks, 510 



,, ,, ,, ,, five stages in, 89, 635 



,, ,, ,, ,, multiple response in, 538 



,, ,, ,, ,, relation between stimulus and, 657-659 



,, ,, ,, ' ,, similarities of, in plant and animal, 528 



55 55 ,, ,, ,, in motor and sensory, 529 



55 55 >5 three types of, 519 



,, ,5 5 > 55 transient enhancement of, on cessation 



of tetanisation, 536 



Nerve of plant, discovery of, 470 



,, ,, response of, conversion of abnormal to normal after tetanisation, 



475 _ 



,, ,, ,, conversion of abnormal to normal by increasing in- 



tensity of stimulus, 476 



,, ,, ,, effect of alcohol on, 473 



,, ,, ,, effect of ammonia on, 474 



,, ,, ,, effect of CO 2 on, 472 



,, ,, ,, effect of ether on, 472 



,, ,, ,, effect of tetanisation in enhancing, 476 



5, ,, ,, three types in, 475 



,, ,, similarities of response in, and in animal, 471-478 



Nerve of plant, mechanical response of, 528 



,, ,, ,, ,, determination of velocity by, 525 



55 55 55 55 CffCCt Of light Ott, 557 



,, ,, ,, ,, enhancement after tetanisation, 554 



Nervous impulse, two kinds of, 647 



,, ,, various direct and indirect manifestations of, 648 



Noll, Haberlandt, and Nemec, statolithic theory of, 435 

 Nymphce.a alba^ response of leaf of, 246 



Ophiocephalus, mechanical response of optical nerve of, 529 



,, response in retina of, 427-429 



Oscillating recorder, 527 

 Optic nerve and cornea, differential excitability between, 417 



PACINI, law of, 242 



Pfeffer and Czapek on theory of geotropism, 435 

 Pfliiger, avalanche theory of, 502 

 Pfliiger's law : its failure with high E.M.F., 579 

 ,, ,, with low E.M.F., 581 



,, ,, of polar effects of currents, 578 

 Phasic reactions, alternating, 100 



,, variations of current of rest, 302, 303 



55 55 55 turgidity, 305 



Phenolpthaline, detection of transport channels by, 360 

 Polar effects of currents, demonstration of : 



,5 ,, ,, ,, by motile response in plants, 579 



5, 55 j, ,j by subjective sensation, 582 



