i9] 



AMERICAN FORESTRY ASSOCIATION. 



"5 



the average diameter, breast high, is 8% years. This shows the annual increment 

 inches; the extremes of height are 37 and of the later years to be very small 

 54 feet, with an average of 44 feet. Ages Counting the annual rings Erom the out- 

 range between 150 and 163 years, with an side, the tree of most rapidgrowth includes 

 average of 154 years. 25 in the last inch added u> ^ d j 



BURN OF 18S9 ON BLACKFEET RESERVATION, NEAR MinYAI.l., 

 MONTANA. DENSELY RESTOCKED WITH LODGEPOLE PINE. 



Comparing the averages of diameter and the tree of slowest growth includes 75 



age is enough to show the present rate of 

 growth. It is found that at 50 years the 

 average tree has acquired a diameter of 

 5.3 inches, or about 62 per cent, of the 

 present diameter; and at 100 years of age 



rings, and averaging the six trees, it ap- 

 pears that it has taken 48 years to add the 

 last inch in diameter to this forest. An 

 annual increment of .(>- of an inch is in- 

 deed slow growth. The trees are sound 



it has S6 per cent, of the diameter at 154 and healthy in appearance, but the crown-. 



