7 2 



U. SUZUKI. 



Ca, Sr, and Ba (I shall hereafter call, for convenience, the plants 

 treated with solution i), Ca plants, with solution 2), Sr plants 

 etc.). 



The solutions were given almost every day and the details 

 noticed. At first, there was no difference among the plants, but 

 afterwards the Sr and Ba plants gradually showed signs of 

 suffering, while the Ca and Ca -f Sr plants grew on equally well. 

 Toward the end of the experiment, the suffering of the Sr and 

 Ba plants became very serious, many plants beginning to die off, 

 many leaves falling down, and the stems unable to stand upright, 

 so that I could not keep them any longer. On the 24th, the 

 plants were carefully removed from the sand, washed well, and 

 the following measurements made : 



PLANTS TREATED WITH SOLUTION. 





' 0 



2) 



3) 



4) 





Ca plants 



Sr plants 



Ba plants 



Ca + Sr plants 



Number of plants 



20 



15 



28 



'7 



length of stem 



12.9cm 



11.4 



10.8 



1 1.4 



Length of petiole 



2-4-3-3 cm 



0.6-0.9 



1.5-1,8 



2.1-3.0 



Length of roots 



6.0-10.5011 



6.0 



4-5-7-5 



9.0 



Total weight of fresh stems 



7-04SR 



3-895 



5-245 



5-625 



Total weight of fresh leaves 



3-95og 



'■'95 



'•395 



3-285 



Weight of 1 fresh stem 



0352g 



0260 



0187 



0331 





0198s 



0080 



0050 



0193 





3.6cm 



24 



2.4 



30-36 



In the Ca and Ca + Sr plants two or three new leaves develop- 

 ed in each plant, the diameter of which was in the former 2.1-3.6 

 cm. and in the latter 1.5-3.0 cm., while in the Sr and Ba plants no 

 development of new leaves was observed. We see from the 

 above results that the Ca plants were best, the Ca -f Sr plants 

 being nearly on the same footing with them, but somewhat 

 inferior ; Sr and Ba plants were nearly equal in length among 

 themselves, but the stems were very small and slender, so that 

 they could not stand upright. The growth of leaves was 



