82 BOAKU OK AGRICULTURE. [Jan., 



as it did originally. The plat receiving sulphate of ammonia 

 and lime is still slightly acid in its reaction upon blue litmus 

 paper. The plat receiving nitrate of soda but no lime is still 

 more acid, and the one receiving sulphate of ammonia but no 

 lime, reacts far more intensely acid than at the outset. At the 

 time when the varieties of plants were grown which are to be 

 shown upon the screen, even the limed plat, which received 

 nitrate of soda, was still very slightly acid as shown by blue 

 litmus paper, and the others differed from it only in the degree 

 of acidity. 



The two apple trees at the left grew where sulphate of am- 

 monia had been applied, and the two at the right upon plats 

 receiving nitrate of soda. The better growth at the right of 

 each pair shows that liming was helpful. The tests unfor- 

 tunately could not be continued to the time of fruiting, and 

 hence they throw no light upon the yield and the quality of the 

 fruit as aflfected by liming. 



It will be observed that in both instances the Norway spruce 

 trees exhibit injury from liming. The same susceptibilitv to 

 injury by liming is said to be true of the chestnut, azalia, 

 rhododendron, and of certain other members of the family to 

 which the two latter plants belong. 



The white birch has shown marked adaptability to acid 

 unlimed soils, but it seems less likely to be injured by liming 

 than the spruce, cranberfy, and certain other trees and herba- 

 ceous plants that might be named. 



The quince bushes show a marked beneficial influence of 

 the lime. A similar though somewhat less striking benefit 

 from liming was observed with cherries and the American lin- 

 den. 



The two lots of cranberry vines at the left grew upon the 

 plats receiving sulphate of ammonia, and it is of much interest 



