TRANSITION, ETC. 



107 



half of which is allowed to stand as second period, 

 and the other half carried to the third period. 

 Of the 35,000 acres in the third period, we carry 

 20,000 acres to the fourth period ; and the remain- 

 ing 15,000 acres, with 5000 acres of the fourth 

 period, being carried to the fifth period, we have 

 left 10,000 acres of the fourth period and 10,000 

 acres of the fifth period to carry to the sixth 

 period. 



Having thus arranged the area in classes, it is 

 evident that we cannot commence cutting at once 

 without cutting immature timber for the next 

 eighty years, by which course we should lower 

 the money value of the increment, which is 

 ordinarily highest in the last twenty years of the 

 rotation ; and unless immature timber were in fair 

 demand, yielding a good profit, it would be desir- 

 able to give such a forest rest for a time. 



Let us see now what would be the result of 

 laying it up for twenty years 



* By cutting out the oldest first, we should guard against cutting 

 any under a hundred years old. 



