forest, fish and game commission. 7 1 



Beech. 



Beech will give little more than i log, i6 feet long to each tree. Cutting to a 12- 

 inch diameter limit, 



12 trees = looo feet, B. M. 



Ash, elm, bassvvood, and black cherry are found in the Adirondacks, but in such 

 small numbers that little attention is given to them in estimating. 



The degree of accuracy reached with the strip method will depend upon the 

 distance between the parallel strips ; the less the distance, the greater the degree of 

 accuracy. Where only a small degree of inaccuracy is allowable, the strips may be 

 run adjacent to each other, in which case all the trees of the stand would be 

 counted. Each strip may then be from lo to 20 rods wide. 



Many estimators, instead of counting the trees and then estimating the number 

 of logs, and finally the volume, estimate the volume of the individual trees at once. 



According to trials which Ihrig has made in Germany in estimating the volume 

 of trees in adjacent strips, the maximum errors of individual estimators were + 11.5 

 and — 3.8 per cent, the arithmetical mean of which being -f 3.8 per cent. Ihrig 

 believes that under favorable circumstances (much practice, uniformity of stock, 

 familiarity with the respective species and local growth conditions) very satisfactory 

 results may be reached. 



• These requirements, however, can seldom be satisfied, and since it takes nearly as 

 much time to make a thorough estimate as it does to actually measure the trees, 

 measurement Avill be preferred, as it is much more accurate. 



THE SQUARE METHOD. 



By this method the estimating is 

 done in squares, containing generally 

 2}4 acres. Thus a 40-acre lot would be 

 divided into 16 squares. 



40-AcRE Lot. 

 The estimator begins, for example, 

 at the southwest corner of the 40-acre 

 lot. He paces 10 rods east, then 10 

 rods north, which brings him to the 

 center of the square. He stands here 

 and locates, as well as he can, by means 

 of trees, logs, etc., the boundary lines 

 of the square, and estimates the timber 









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