VEGETABLES. 289 



the least inconvenience. So oaks may be 

 barked while the leaf is budding ; but as 

 soon as they are expanded, the bark will 

 no longer part from the wood, because the 

 sap that lubricates the bark and makes it 

 part, is evaporated off through the leaves. 



White. 



RENOVATION OF LEAVES. 



When oaks are quite stripped of their 

 leaves by chaffers, they are clothed again 

 soon after Midsummer with a beautiful 

 foliage ; but beeches, horse-chesnuts, and 

 maples, once defaced by those insects, 

 never recover their beauty again for the 

 whole season. White. 



ASH TREES. 



Many ash trees bear loads of keys every 

 year, others never seem to bear any at all. 

 The prolific ones are naked of leaves and 

 unsightly ; those that are steril abound in 

 foliage, and carry their verdure a long 

 while, and are pleasing objects. White.^ 



VOL. II. u 



