TIMBER ESTIMATING 



163 



themselves. The trees on this strip, 66 feet long and 66 feet 

 wide, are calipered and tallied as described under A . 



This square of 66 feet each way is one-tenth of an acre. When 

 all the trees on this area have been measured the crew moves on 

 another chain length in the fixed compass direction. The chains 

 are tallied after moving forward. Ten chains complete the acre, 

 which is all that is talHed on one sheet. A description of the 



By permission of the Connecticut State Forester. 



Fig. 60. — A portable sawmill of small capacity, such as is commonly used in southern 

 New England. 



forest is written on the back of the sheet with special reference 

 to the type, so that all acres measured in a certain type can be 

 averaged together. If there is a marked change in type in the 

 course of an acre, it is better to start a new sheet, the tally of 

 chains showing that this sheet represents .6 or .8 of an acre, etc., 

 as the case may be. A continuous strip of eight acres covers a 

 mile of distance: 66 X 10X8 = 5280 feet. The tract is gridironed 

 with these strips. The distance apart of the lines depends upon 



