2 



THE BOTANICAL MAGAZINE. IVoi. xxvm. No. 325. 



MgCL 5 cc+1/10 N. BaCU 25 cc, 1/10 N. BaCl. 30 cc, 1/10 N. 

 MgCh 25 cc+1/10 N. SrCl2 5 cc, 1/10 N. MgCl^ 20 cc + 1/10 N. 

 SrCl2 10 cc, 1/10 N. MgCk 15 cc+1/10 N. SrCl^ 15 cc, 1/10 N. 

 MgCl2 10 cc + 1/10 N. SrCU 20 cc, 1/10 N. MgCU 5 cc + 1/10 N. 

 SrCls 25 cc and 1/10 N. SvCl, 30 cc respectively. Five seedlings, 

 about 25 mm high, which were grown in distilled water from 

 seeds of almost uniform size and specific gravity (1.185-1.200), 

 were transplanted in each of the respective beakers on February 

 25th (1913) and kept in the green house. The evaporated 

 water was supplemented with distilled water from time to time 

 so as to keep the culture solutions always in their initial con- 

 centration. On March 14th, the diflerence in development in 

 the respective culture was very striking, and measurement was ' 

 then made with the following result : j 



Solutions u.ed 





of'r^oi 



Xun.ber 



Distilled water 30 cc. 





60 



8 



1/10 K M0CI2 30 cc. 



53 



12 





1/10 N. MgCl^ 25 cc. + l/lON.CaCl^ See. 



68 



50 



9 



1/10 N. MgCl^ 20 cc. + l/lON.CaCiaOcc. 



65 



40 



10 



1/10 N. MgCla 15 ec. + l/10N.CaCL15cc. 





35 





1/10 IS'. MgCl^ 10 cc. + 1/10 N. CaCl, 20 cc. 



60 



20 



8 



1/10 N. MgCL 5 cc. + 1 /20 N. CaCi^ 25 cc. 



52 



15 



6 



1/10 N. CaCls 30 cc. 



44 



12 



8 



1/10 N. MgCU 25 cc. + l/10N.BaCl2 5cc. 



40 



12 





1/10 N. MgCla 20 cc. + l/lON.BaCiaOcc. 



33 



10 





1/10 N. MgCl, 15 cc. + l/10N.BaCi,15cc. 









1/10 N. MgCl^ 10 cc. + l/10N.BaClo20cc. 



28 







1/10 N. MgCI, 5 cc. + l/10N.BaCl2 25cc. 



28 



5 





1/10 N. BaCIa 30 cc. 



24 



8 





1/10 N. MgC% 25 cc. + l/lON.SrCl, 2 cc. 



60 



12 



3 



1/10 N. MgCL 20 cc. + l/lON.SrCl, 10 cc. 



45 



8 



3 



1/10 N. MgCl^ 15 cc. + l/lON.SrCUScc. 



40 



5 



2 



1/10 N. MgCla 10 cc. + l/lON. SrCl^ 20cc. 





7 





1/10 N. MgCIo 5 cc. + 1/10 N. SrCl^ 25 cc. 



30 



9 





1/10 N. SrCl^ 30 cc. 



22 



8 





