490 



MAE NO J 



the ioth of March, however, the 4 blossoms (A) had dried up 

 while the still closed buds died in this state. The branches in 

 water, however, had 14 and those in ammonium sulphate 11 

 healthy blossoms. In other experiments, the solutions were ap- 

 plied in half the concentration as before but the result was essen- 

 tially similar ; after 8 days, all the 14 buds on the branches (A) 

 had withered and become brown, while the branches (B) and (C) 

 with all their opened buds remained healthy. 



III. Experiments with Leaves. 



Young leaves of Aescit/iis turbinata 15-17 cm. in length were 

 placed in 1 p. m. solutions. 



After 4 days, a loss of turgor could be observed with the 

 plants A, and several days later black spots appeared, especially 

 along the veins, which spread gradually and extended over 

 all the leaves after 11 days. The leaves B and C, however, 

 retained their normal appearance. This experiment was repeated 

 with solutions of half the concentration with essentially the same 

 results. In the next experiment, leaves of Prututs cerasus 

 (5 pieces) were placed in 0.5 °/o solutions. After 5 days, brown 

 spots developed on the leaves A, which after 8 days had spread 

 so much that the leaves might be considered as completely killed. 

 Soon afterwards, the solution in which these leaves were kept be- 

 came reddish from extracted organic matters. 



The leaves B showed at this time only very small and few 

 brown spots, while leaves C showed only one such spot of very 

 small size. 



IV. Experiments with Seeds. 



Seeds of rice, barley, soya bean, and turnips, 20 of each, 

 were placed for 58 hours in 0.5 °/„ solution of calcium amido- 

 sulphonate (A) ; in ammonium sulphate (0.5 °/i>) (B) and again in 

 pure water (C). 



The seeds were then placed on moist filter paper, covered 

 with a bell jar, and the number of germinated seeds counted 

 every evening for twelve days. The result is given in the follow- 

 ing table : 



