1919 



Gail; on Fucus and Hydrogen Ion 



SOS 



pH&0-8I 



6royvth of 3porel/r?g5 when the 

 temperature yaned from l/°C. to 17° C. 



J L 



pH8.6 

 pH7.0 



3 5 



13 18 



PLATE 51 



^5 Z9 



Days 



