PLANTING MIXED COPSES. 199 



Although the foil were capable of producing 

 excellent Am, Sycamore, or Elm, thefe muft ne- 

 ceflarily be rejected, becaufe they want at lead 

 one of the properties required ; and forne of the 

 other kinds, whofe barks contain the tanning 

 principle in the greateft quantity, as the Oak, 

 the Spanifh Chefnut, the Birch, the Black Pop- 

 lar, the Mountain-Am, the Huntingdon and 

 Bedford Willow, and the Alder, muft be pre- 

 ferred. Even among the plants juft named, it 

 can hardly happen that there will not be found a 

 fufficient number of kinds to anfwer even the moft 

 various foil and furface which may happen to be 

 contained within the precincts of the propofed 

 copfe. 



Suppofmg the copfe mould confift of the a- 

 bove kinds, the trees mould be planted at thp 

 diftance of fix feet apart ; ancl the interfaces 

 fliould be filled up with a like number of nurfes, 

 bed fuited to the foil and fuuation. The greateft 

 part of the nurfes fliould probably be Larches, be- 

 caufe they not only rife fafter, but they thrive in 

 a greater variety of foils, and their timber is mon? 

 early of general ufe, than any other of the nurfes 

 generally employed : Befides, the bark of the Larch 

 contains the tanning principle in a very corifider- 

 able proportion ; and, if it can be put to ufe, 

 (which will probably be fomewhat difficult, o?i 

 account of the rofm connected with it), the Larcji 



may 



