230 



THE BOTANICAL MAGAZINE. 



[Vol. XXVII. N I. 82& 



Solutions used 



J. ogth 

 of Leaf 



L'.-ngth 

 of root 



Number 



of roots 



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



nun. 



47 



ii 



35 



7x 



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



68 



35 



7x 



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



59 



35 



6x 



1/10 N. K 2 S0 4 15 cc. + 1/L0 N. NaCl 15 cc. 



52 



30 



7x 



1/10 N. ii 2 5'0 4 10 cc. + 1/10 N. NaCl 20 cc. 



60 



33 



7x 



1/10 N. K,S0< 5 cc. + 1/10 N. NaCl 25 cc. 



65 



35 



6x 



1/10 N. NaCl 30 cc. 



46 



25 



3x 



Distilled water 30 cc. 



78 



58 



7 



X Only one root was well developed. 



X. Experiment with Na 2 S0 4 and KCl. 



The same antagonism as that of preceding experiment was 

 again repeated with sodium sulphate and potassium chloride in 

 the same manner. The following result which coincides with 

 that of the previous experiment, was obtained : 



Solutions used 



Length 

 of leaf 



Length 

 of root 



Number 

 of roots 



1/10 K Na 2 80 4 30 cc. 



mm. 



45 



mm. 



20 



2x 



1/10 N. Na 2 S0 4 25 cc. + 1/10 N. KCl 5 cc. 



72 



25 



7x 



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



65 



26 



7x 



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



60 



18 



6x 



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



64 



25 



7x 



1/10 N. Na 2 S0 4 5 cc. + 1/10 N. KCl25co. 



71 



28 



5x 



1/10$. KCl ZOcc. 



50 



25 



7x 



Distilled water 30 cc. 



78 



58 



7 



X Only one root was well developed. 



XI. Experiment with Na 2 S0 4 and KN0 3 . 



The antagonistic action of Na', K', SO," and NO ' ions on 



each other was examined with sodium sulphate and potassium 



