DISTRIBUTION OVER THE FOREST. 



22? 



Coupe No. 1 (youngest). 

 1 year old trees = 10 acres 



21 

 41 



61 



81 



= 10 

 = 10 

 = 10 

 = 10 



Coupe No. 2. 

 2 year old trees = 10 acres 



22 



42 

 62 



82 



= 10 



= 10 

 = 10 

 = 10 



Total = 50 acres 



Coupe No. 19. 



Total = 50 acres 



Coupe No. 20 (oldest). 

 19 years old trees = 10 acres 20 years old trees = 10 acres 

 39 =10 ! 40 =10 

 59 =10 j 60 =10 

 79 =10 I 80 =10 



99 



=10 

 Total = 50 acres 



100 



= 10 



Total =50 acres 



Each year the 100 years old trees in the oldest coupe would 

 be cut, which cover an area equal to one-fifth of the coupe, or 

 equal to 10 acres, thus cutting once the whole area of the forest 

 in 100 years. It is needless to add, that such regularit} T is 

 never reached in practical forest management. 



3. Distribution of the Age Classes over the Forest. 



Under a normal distribution of the age classes is under- 

 stood that which admits of a proper succession of cuttings, so 

 that each wood is cut at the proper age, and that external 

 dangers can be successfully resisted. 



It has already been explained that every deviation from the 

 normal age interferes with the full realization of the objects of 

 management; hence the age classes should be so distributed 

 that no such deviations are called for. The latter are generally 

 caused by threatening dangers, such as strong winds, dry air 

 currents, danger from frost, fire, insects, &c., sometimes by 

 considerations for a successful regeneration. 



Strong ivinds or gales are a most important consideration. 



