132 NATURAL HISTOBY 



foliage will shift much better for itseli, than 

 where the snow is partly melted and frozen? 

 again, 



It may perhaps appear at first like a para- 

 dox ; but doubtless the more tender trees 

 and shrubs should never be planted in hot 

 aspects ; not only for the reason assigned 

 above,but also because,thus circumstanced, 

 they are disposed to shoot earlier in the 

 Spring, and to grow on later in the Au- 

 tumn, than they would otherwise do, and 

 so are sufferers by lagging or early frosts. 

 For this reason also plants from Siberia will 

 hardly endure our climate : because, on the 

 very first advances of Spring, they shoot 

 away, and so are cut off by the severe 

 nights of March 01 "'April. 



Dr. Fothergill and others have expe^ 

 rienced the same inconvenience with re- 

 spect to the more tender shrubs from North- 

 America ; which they therefore plant under 

 north-walls. There should also perhaps be 

 a wall to the east to defend them from 

 the piercing blasts from that quarter. 



This observation might without any im- 



