30 SITUATIONS FOR 



better adapted for Scots firs, then let it be plant- 

 ed with them at the diitances prefcribed for the 

 above mixture. We have no other kinds that 

 will thrive better, or rife more quickly in bleak 

 fituations, than thofe juft mentioned. When the 

 trees in this belt, or zone, have rifen to the height 

 of two feet, fuch hard-wood trees as are intended 

 ultimately to fill the ground, mould be introduced, 

 at the diftance of eight or ten feet from each o- 

 ther, as circumftances may admit. At this pe- 

 riod, or perhaps a year or two afterwards, ac- 

 cording to the bleak or expofed fituation of the 

 grounds, let another parallel belt, or zone, of 

 nearly equal breadth, be added to the one already 

 fo far grown up, and fo on, till the whole grounds 

 be covered. It is not eafy here to determine on 

 the exact breadth of the fubfequent belts or zones : 

 this matter muft be regulated by the degree of 

 expofure of the grounds, by the fhelter afforded 

 by the zone previoufly planted, and by fuch like 

 circumflances. 



In the formation of forefts, we would advife, 

 thaj the feveral forts of timber be planted in dil- 

 tincl maffes, which are to be introduced accord- 

 ing to the nature of the foil ; of which fubject we 

 fliall treat more fully in Section IV. 



Thefe diftincl maffes, however, it muft be ob- 

 ferved, fliould be nurfed by larch, or fuch other 

 nurfes as may be fuitable to the foil and expofure, 



until 



