756 COMPARATIVE ELECTRO-PHYSIOLOGY 



Poison, action of, modification of, by dose and tonic condition, 640, 641 



,, ,, on inorganic response, 9 



Positive response of sub-tonic tissue, 83 



,, ,, unmasking of, from resultant negative, 66 



Pterospermum, analogy with Torpedo, 255 

 Pulvinated and growing organs, similarities of response in, 394 



REID, on response of skin of eel, 289 



Resistivity variation, determination of death-point by, 546 



,, ,, response by, and its correspondence in the other modes of 



response, 549 



,, ,, ,, experimental difficulties of, 540 



,, ,, ,, of metallic particles by, 3, 600-603 



,, ,, ,, of frog's nerve by, 549 



,, ,, ,, of selenium by, 3 



Response, bifurcated expression of, 104 



,, considered as molecular derangement, 590 



,, law of differential, 109 



,, law of isotropic, 75 



,, positive, diphasic, and negative in cauliflower, 62 



in potato, 64 



,, simultaneous record of mechanical and electrical, 17, 19 

 ,, various forms of, 2 

 Response recorder, 34 



Retina, determination of differential excitability of, and optic nerve, 418 

 ,, excitatory after-effect in, 427-430 

 ,, multiple response in human, 430 

 in frog, 426 

 Wallay>, 425 



,, response of, in Ophiocephalus^ 427-429 

 ,, ,, in frog, 418 



,, so-called positive response of, 419 

 Retino-motor effect, 421 



Retinal response, conversion of abnormal to normal, 423 

 ,, ,, explanation of abnormal, 423 



,, ,, three types of after-effect in, 427-429 



Reverser, oscillating, 276 



,, rotating, 280 



Rheotome, observations with, 47, 254 

 Root as digestive organ, 349 

 ,, response of young and old, 353, 354 

 ,, responsive secretion of, 352 

 Rosenthal on current of rest in stomach, 288 

 Rotary Mechanical Stimulator, 291 



SACHS on growth of Cucurbita in darkness, 557 

 Schonlein on oscillatory character of electric discharge, 270 

 Season, influence of, on recovery from stimulus, 45 

 ,, ,, on suctional response, 390 



