454 PLANT GROWTH AND PLANT COMMUNITIES 



TABLE I 



Woodward's Experiments (1699) 

 (Phil. Trans., 1699, vol. 21, p. 382.) 



Weight of plants 

 (in grains) 

 When When Gain in 77 days 



Source of water put in taken out (in grains) 



TABLE II 



Sap Composition in Relation to the Medium* 

 (All sap concentration in milli-equivalents per liter 



Data from CoUander, cited by Steward and Sut cliff e ( 1959). 



TABLE III 



Accumulation of Ions in the Sap of Marine Plants' 

 (Mean sap composition in equivalents per liter) 



Plant Na K CI 



V. macrophysa 

 V. ventricosa 

 Sea Water 



Data from Steward and Martin, cited by Steward and Sutcliffe ( 1959 ) . 



