FORESTRY. 213 



of his wood lot, and how much more would he have made 

 had he sold the cordwood to the furniture maker and the 

 wagon maker ? 



760. A farmer in New England planted 60 acres of 

 white pine. The cost of land, of planting, and of expenses 

 incidental to all the work per acre was as follows: Cost 

 of land, $4 ; cost of seed and growing young trees, $2.42 ; 

 cost of planting, $2.42. What was the cost of 60 acres? 



761. If this money had been placed in a savings bank 

 and had drawn 3 per cent compound interest for 40 years, 

 what would be the total amount of interest? 



762. But this money was invested in a forest instead. 

 What was the total amount invested per acre, including 

 the actual cost and compound interest accumulating dur- 

 ing the 40 years ? 



763. At the end of the 40 years the forest farm yielded 

 40 cords of wood per acre. The wood contained in each 

 cord was valued at $4. What was the value of wood 

 on each acre? 



764. After deducting the initial cost of the forest and 

 interest that might have accumulated at 3 per cent com- 

 pound interest in a savings bank for 40 years, what is the 

 profit for each acre ? 



765. What is the average annual profit per acre? 



766. What is the average annual profit for the 60 

 acres ? 



767. What is the total profit of the 60 acres at the end 

 of 40 years, after allowing for initial cost and accumu- 

 lated interest? 



768. A European larch grove planted in western Min- 

 nesota 17 years ago, now contains post material worth 



