Nov. 1913.J 



K. M1Y ARE.— INFLUENCE OF THE SALTS ETC. 



227 



This was then once more examined with potassium sulphate 

 and chloride in the same manner as in Experiment I, and the 

 result which coincides with that of the experiment with sodium 

 salts 1 -", was obtained as given in the following table : 



Solutions used 



Length 

 of leaf 



Length 

 of root 



Number 

 of roots 



1/10 N. K 2 S0 4 30 cc. 



40 



"35 



6x 



1/10 N. K 2 S0 4 25 cc. + 1/10 N. KGl 5 cc. 



47 



43 



7x 



1/10 N. K 2 S0 4 20 cc. + 1/10 N. KGl 10 cc. 



47 



35 



6x 



1/10 N. K 2 S0 4 15 cc. + 1/10 N. KGl 15 cc. 



40 



32 



6x 



1/10 N. K 2 S0 4 10 cc. + 1/10 N. KOI 20 cc. 



50 



50 



7x 



1/10 N. K 2 S0 4 5 cc. + 1/10 N. KGl 25 cc. 



47 



35 



7x 



1/10 N. KGl 30 cc. 



35 



25 



6x 



Distilled water 48 cc 



68 



43 



7 



X Only one root was well developed. 



V. Experiment with Na 2 S0 4 and NaNOa. 

 The antagonism between SO/' and N(V ions on each other 

 was established with sodium sulphate and nitrate according to 

 a method identical with that of the Experiment T. The follow- 

 ing result was obtained : 



Solutions used 



Length 

 of leaf 



Length 

 of root 



Number 

 of roots 



1/10 N. NaoSO, 30 cc. 



35 



nun. 



35 



2x 



1/10 N. No 2 S0 4 25 cc. + 1/10 N. NaNO s 5 cc. 



52 



35 



5x 



1/10 N. Na 2 80 4 20 cc. + 1/10 N. NaNO s 10 cc. 



52 



35 



5x 



1/10 N. Na 2 S0 4 25 cc. + 1/10 N. NuN0 3 15 cc-. 



40 



35 



5x 



1/10 K Na 2 80 4 10 cc. + 1/10 ^.NaNO, 20 cc. 



50 



3.5 



5x 



1/10 N. Na 2 S0 4 5 cs. + 1/10 K NaN0 3 25 cc. 



45 



30 



5x 



J /10 N. NaNOs 30 cc. 



35 



35 



2x 



Distilled water 30 cc 



68 



43 



7 



X Only one root was well developed. 



1) Experiment No. V. of the paper II. 



