GROWTH AND TROPIC 

 MOVEMENTS OF PLANTS 



CHAPTER I 



INTRODUCTORY 



_ Growth and Tropic Movements of Plants 



ERRATA. 



Page 30, line 17, foy ' seconds ' read ' minutes.' 



,, 97, fourth line from bottom, for ' fiat ' read ' rough.' 



,, 118, last line but one, for ' 30 ' read '20.' 



,, 348, ninth line from bottom, the word ' the ' should be inserted before 



' mechanical.' 

 ., 352, second line from bottom, for ' reaction ' read ' reactions.' 

 ,, 392, seventh line from bottom, for 'has ' read 'have.' 

 ,, 410, Table LIV, for 'rotation ' read ' torsion.' 



Bose, Growth and Tropic Movements. 



ana laii 01 lemperature. iney may act on organs wnicn 

 exhibit all degrees of physiological differentiation, from 

 the radial to the dorsiventral. An identical stimulus some- 

 times induces one effect, and at other times precisely the 

 opposite. Thus, under unilateral stimulation by light of 

 increasing intensity, a radial organ exhibits first a positive, 

 then a dia-phototropic, and finally a negative movement ; 



