NORTHERN EXPOSURE. 



45 



a lip on one side, as at (A) in figure 2, it will be 

 likely to maintain its hold. Among 

 those pears which are most reliable 

 upon such a site, may be named, 

 the Bartlett, the Beurre d' Anjou, 

 the Beurre Bosc, the Merriam, the 

 Nouveau Poiteau, the Onondaga, the 

 Glout Morceau, and the Vicar of 

 Winkfield. Such an exposure is de- 

 sirable for the cherry, and most par- 

 tially tender fruits, because they must 

 have abundant air to ripen their shoots. All of 

 the small fruits will succeed admirably. 



Northern exposure is best adapted to the most 

 tender species, because it is comparatively free from 

 those vicissitudes of temperature which are found 

 on a southern slope. It is a well-known fact that 

 where ivies and rhododendrons will perish during 

 the first winter in which they are exposed on the 

 southern or eastern side of a building or declivity, 

 they flourish often for years on the northen. 



If we examine closely the bud of a hardy tree dur- 

 ing the winter, we shall discover that it consists of 

 many layers of minute leaves, and that the whole is 

 covered with a coat of scales that is lined with a 

 thick pubescence, which acts as a non-conductor of 

 heat. This is generally true of the buds of all trees 

 of a cold climate. Consequently they require regular 



