INDEX 769 



Desitiodiuin pulsation, eflect of acid on, 352 



,, ,, ,, alcohol on, 324 



,, ,, ,, alkali on, 352 ' 



,, ,, ,, barium salt on, 351 



,, ,, ,, carbonic acid on, 325 



,, ,, ,, copper sulphate solution on, 326 



,, ,, „ light on, 691, 692 



,, ,, ,, temperature on, 332-33S 



,, ,, period and amplitude of, 317 



,, ,, periodic variation of, 341 



,, ,, similarity between Biophytuni pulsation and, 345 



,, ,, ,, ,, cardiac pulsation and, 345-354 



,, ,, spark- record of, 327 



,, ,, temperature, maximum of, 331 



,, ,, thermo-tonic minimum of, 331 



Detmer on photonasty, 643 

 Development, thermographic, 184 

 De Vries on epi- and hypo-nasty, 643 



,, on heliotropic action on leaves, 622 

 ,, on plasmolytic method, 549 

 Dia-geotropism, so-called, 640, 654 

 Dia-heliotropism, so-called, 640-654 

 Differential response in plant, 14 



,, ,, magnification of, 51 



,, ,, of compound strip, 13 



Directive versus non-directive action of light, 634 

 Diurnal sleep, 629, 633, 634 



Dorsi-ventral organ, differential geotropic action inducing torsion in, 662 

 ,, ., ,, heliotropic action inducing torsion in, 658 



,, J, no specific sensibility in, 577 



Dutrochet on conducting elements in Mimosa, 251 



Electric radiation, effect of, on Mimosa, 619 



,, response, difference of excitability detected l)y, 38 



,, ,, laws of, 42 



,, ,, multiple, 279 



,, ,, of inorganic substance, 40 



,, ,, simultaneous mechanical and, 34 



,, ,, to direct stimulation, 32, 518 



,, ,, to indirect stimulation, 37, 517 



,, ,, true excitatory negative and hjdrostatic ]X)sitive, 35, 37 



,, waves, effect of, on growth, 618 



' Electrification ' of soil, effect of, on growth, 560 

 Electromotive Method, detection of excitatory wave by, 261 

 Electrotactile Method of detection of excitation, 256, 280 

 Electrothermic stimulator, 1 7 



Elfectrotonus, variation of excitabilit)' \>y, 234, 235, 236 

 Elfving on geotropic action on grass-haulm, 496 

 Eiytkriita iiu/iia, differential geolrupic response of, 664, 665 



3D 



