232 



THE BOTANICAL MAGAZINE. 



[Vol. XXVII. No. 323 



XIII. Experiment with KNO ; and NaCl. 



The antagonism between K', Na A , N0 3 ' and CI' ions in com- 

 bination with each other was examined with potassium nitrate 

 and sodium chloride in a manner similar to that of Experiment 

 VII. The folio wine result was obtained : 



Solutions used 



Length 

 of leaf 



Length 

 o root 



N umber 

 of roots 



1/10 N. KN0 Z 30 cc. 



mm. 



45 



mm. 



25 



3x 



1/10 N. KN0 3 25 cc. + 1/10 N. NaCl 5 cc. 



65 



30 



5* 



1/10 N. KN0 3 20 cc. + 1/10 N. NaCl 10 cc. 



62 



30 



5* 



1/10 N. KN0 3 15 cc. + 1/10 N. NaCl 15 cc. 



60 



25 



4x 



1/10 N. KN0 & 10 cc. + 1/10 N. NaCl 20 cc. 



63 



25 



5x 



1/10 N. KN0 3 5 cc. + 1/10 N. NaCl 25 cc. 



75 



35 



7x 



]/10N.JVa^30cc. 



46 



25 



1 



Distilled water 30 cc. 



78 



58 



7 



X Only one root was well developed. 



XIV. Experiment with NaN0 3 and KC1. 



The same antagonistic phenomenon as observed in Experi- 

 ment XIII was again tested with sodium nitrate and potassium 

 chloride. The following result, which almost coincides with 

 that of the preceding experiment, was obtained : 



Solutions used 



Length 

 of leaf 



Length 

 of root 



Nnmber 



of roots 



1/10 N. NaNO s 30 cc. 



mm. 



43 



mm. 



20 



1 



1 /10 N. NaN0 3 25 cc. + 1/10 N. KCl 5 cc. 



75 



30 



7x 



1/10 N. NaNO, 20 cc. + 1/10 N. KCl 10 cc. 



65 



35 



6x 



1 / 1 N. NaNO, 15 cc. + 1/10 N. KCl 15 cc. 



62 



35 



6x 



1/10 N. NaNO s 10 cc. + .1/10 N. KCl 20 cc. 



64 



25 



4x 



1 /1 N. NaN0 3 5 cc. + 1/10 N. KCl 25 cc. 



70 



25 



7x 



1/10 N. KCl 30 cc. 



50 



25 



7x 



Distilled water 30 cc. 



78 



58 



7 



< •nU- 



il was well developed. 



