K. MTYAKE.—ISFLZJESCE OF THE SALTS ETC. 



231 



nitrate in the same manner as in Experiment YIL The result 



obtained was as follows : 



Solutions used 



Length 

 of leaf 



Length 

 of root 



Number 

 of roots 



1/10 X. Na 2 S 4 30 cc. 



III ID. 



45 



mm. 



20 



2x 



1/10 N. Na<J30 A 25 cc. + 1/10 N. KNO z 5 cc. 



65 



35 



6x 



1/10 N. Na 2 S0 4 20 cc. + 1/10 N. KNO z 10 cc. 



70 



30 



7x 



1/10 N. Na 2 S0 4 15 cc. + 1/10 N. KNO z 15 cc. 



60 



30 



3x 



1/10 X. Na 2 S0 4 10 cc. + 1/10 N. KNO z 20 cc. 



77 



30 



7k 



1/10 X. Na 2 S0 4 5 cc. + 1/10 N. KNO s 25 cc. 



60 



35 



4x 



1/10 N. KNO z 30 cc. 



45 



25 



3x 



Distilled water 30 cc. 



78 



5S 



7 



Only one root was well developed. 



XIX. Experiment with K 2 S0 4 and 3S T aN0 3 . 



The same antagonism as in the preceding experiment was 

 once more examined with potassium sulphate and sodium 

 nitrate. A result very similar to that of Experiment XI was 

 obtained as will be seen in the following table : 



Solutions used 



Length 

 of leaf 



Length 

 of root 



Number 

 of roots 



1/10 X. K 2 S 4 30 cc. 



mm. 



47 



mm. 



35 



7x 



1/10 N. K 2 S0 4 25 cc. + 1/10 X T . NaNO z 5 cc. 



73 



30 



7x 



1/10 X. K 2 S0 4 20 cc. + 1/10 X. NaN0 3 10 cc. 



60 



20 



5x 



1/10 X. K 2 S0 4 15 cc. + 1/10 X. NaNO z 15 cc. 



60 



25 



5x 



1/10 X. K 2 S0 4 10 cc. + 1/10 X. NaNO z 20 cc. 



60 



35 



6x 



1/10 X. K 2 S0 4 5 cc. + 1/10 X. NaNOz 25 cc. 



72 



40 



5x 



1/10 X. NaN0 3 30 cc. 



43 



20 



1 



Distilled water 30 cc. 



78 



58 



7 



X Only one root was well developed. 



