44 SUMMIT OF HILLS. 



nights this loss of carbon is not only prevented, but 

 carbonic acid is slowly acquired. He placed several 

 plants, which were in full growth, w^here they would 

 receive no light, and at the rise of the moon he 

 exposed a part of them to its rays. These kept 

 their green color and healthy appearance, while the 

 others perished. He states that this influence of 

 the moon, if true, is probably the cause of the in- 

 creased growth of plants during the full of the 

 moon, which has been noticed by some naturalists. 



The meteorological phenomena which influence 

 the growth and productiveness of fruit-bearing 

 plants have now been considered, and it remains for 

 us to name those fruits which are adapted to the 

 different exposures. 



The summit of hills cannot easily be protected from 

 severe winds in the manner which was suggested 

 upon plains, but must be more or less subject to 

 them. Therefore, in the selection of fruits for such 

 a position, those should be chosen which hold fast 

 to the tree. The Flemish Beauty pear is notorious 

 for the ease with which it separates from the spur. 

 If we examine for the cause, we find that all those 

 large pears which have slender stems, drop easily ; 

 the wind swings them, the stem breaks, and the 

 fruit falls. This style of stem is more generally 

 found in the Bergamottes, as in figure 1. Where 

 the stem is thick and fleshy, and especially if it has 



