•202 



THE BOTAMcAL MAGAZINE. 



[Vol. xxvn. No. si 



Solutions ii~cd 



Length 



Length 

 of root 



Number 

 of roots 



1 



1/10 N. NaCl 30 cc. 



mm. 



38 



in))). 



25 



1/10 N. NaCl 25 cc. + 1/10 N. 3fgS0 4 5 cc. 



55 



37 



6x 



1/10 N. NaCl 20cc. + l/10 N. MgS0 4 10 cc. 



50 



33 



4x 



1/10 N. NaCl 15cc. + l/10N. MgS0 4 15 cc. 



45 



30 



3x 



1/10 N. tfaCZ lOcc. + 1/lO N. J/^/SO, 20 cc 



48 



31 



1 



1/10 X. 2VaCZ 5cc. + l/10N. MgS0 4 25 cc. 



48- 



32 



1 



1/10 N. J/(/,5'0 4 30 cc. 



30 



25 



1 



Distilled water 30 cc. 



.30 



80 



6 



X Only one root was well developed. 



From the table, it is clear that the antagonistic result 

 between these ions almost coincides with the combined result 

 of these in the experiment I and V or VI. 



VIII. Experiment with Na 2 S04 and MgCl 2 . 



The same antagonism as in the preceding experiment was 

 again examined with sodium sulphate and magnesium chloride 

 in a manner similar to that of the experiment with sodium 

 and magnesium sulphate. The result obtained almost coincides 

 with that of the preceding experiment as will be seen in the 

 following table. 





Length 



Length 



Number 





of leaf 



of root 



of roots 



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



mm. 



45 



35 m " 



1 



1/10 N. Na z 80 4 25 oc.+ 1/10 N. BIgCl, 5 cc. 



80 



40 



Gx 



! /10 N. Na z S0 4 20 cc. +1/10 N. Mg( % 10 cc. 



80 



38 



<;x 



1/10 N. Na 2 S0 4 15 cc + 1/10 N. MgCl % L5cc. 



65 



45 



4x 



L/10 N. Na 2 S0 4 LOcc. + l/lO N. MgCl 2 20cc. 



5 1 



30 



1 



1/10 N. Na 2 S0 4 5cc.+ L/10 N. MgC% 25 cc. 



lit) 



•j:> 



1 



L/10 N. MgCl 2 30 cc. 



55 



40 



1 



Distilled water 30 cc. 



80 





7 



X Only ..in root wan well develo|vil. 



