INDEX 7?l 



Galvanotropic response, 558 



Geotropic response, at inclinations of 45 and 135 , 500 



» effect of unilateral application of cold on, 504, 505 



j, ,, mechanics of, 495 



35 ? j method of recording, 499 



j» ,, of shoot and root, 544 



,, ,, torsional, 664 



1 , , , true character of, 502 



,, sensibility, localisation at root-tip, 539 

 Geotropism, differential, 663 



,, radial pressure and statolithic theories of, 494 



Glow-response, 211 

 Grass -haulms, geotropic response of, 496, 508 



,, growth of, on klinostat, 509 



Greely, A. W. , galvanotaxis of parametria, 698 

 Growing organ and pulvinus, identical nature of responses in, 534 

 Growth, anodic and kathodic effect on, 556 



antagonistic action of acid and alkali on, 484 

 apparent arrest of, at high temperature, 432 

 balanced record of, 413 

 daily periodicity in, 473, 474 

 direct and indirect stimulus on, 438 

 effect of acid on, 483 

 ,, alcohol on, 482 

 ,, alkali on, 483 



,, carbonic acid on, 479 

 ,, electric waves on, 618 

 ,, ' electrification ' of soil on, 560 



,, ether on, 480 



,, NaCl solution on, 485 



,, Na 2 Co 3 solution on, 482 

 ,, poisonous solution on, 486 



,, sugar solution on, 482 

 external stimulus on, 434, 435, 436 

 laws of, 439 

 opposite effects on, of chemical agents on different • constitutions,' 487 



, , , , of large and small doses, 488 



optimum temperature of, 448, 451 



,, translocation of, 454 

 periodic variation of rate of, 470, 473, 474 

 polar action of current on, 557, 558, 559 

 relation of, to hydrostatic pressure, 428 

 ,, to tension, 432 



Growth-curvature, induction of, by electrical current, 553 



,, ,, by unilateral stimulus, 525, 527, 528, 529 



Growth-pulsation, multiple, 417, 432 



,, periodic groupings of, 417, 425 



Growth, renewal of, by external stimulus, 425 



,, ,, by positive turgidity-variation, 426 



3 D2 



