100 SOME EECENT RESEARCHES IN PLANT PHYSIOLOGY 



recorded. In 1 and 2 the tissue was placed in 3-042 per 

 cent, sodium chloride, whereas in 3 sea-water containing 

 2-5155 per cent, of this salt was used. The duration of 

 experiment was in each case twenty-seven hours. At 

 the end of this time the cells were not plasmolyzed, for 

 they had recovered initial plasmolysis owing to penetra- 

 tion of the salt. They were, however, rapidly plasmo- 

 lyzed when placed in 10 per cent, sodium chloride. Trans- 

 ference to tap-water resulted in speedy recovery. This 

 shows that the protoplasm was not seriously damaged. 



TABLE XXIX. 



ABSORPTION or SODIUM CHLORIDE BY THE LEAVES OF SOME 

 NON-HALOPHYTES. 



By these experiments Lewis found that Camellia japonica, 

 Syringa vulgaris, and Arum maculatum, showed at first a 

 decrease in weight both in sea-water and in the salt solu- 

 tion of approximately the same strength. After the first 



