PERIOD OF SLOW GROWTH. 



5 'J 



Taiu.e lU.—yfeasiirements of Longleaf Pine— period of slowest growth from two hundred to two hundred and sixty-six years. 



The following table and diagram (fig. S) present the average results of a detailed study of over 

 sixty trees collected in tlirtereiit localities. Since only the part of the sleni from stump upward is 

 represented, the seedling period of slow growth finds no expression. It will be observed that the 

 growth in height is a maximum between the age of ten iiiid tiiirty years, amounting to 14 feet for 

 each decade; that it is but half of this at sixty and little over oue-tliird at the age of one hundred 

 years. As plainly indicated in the fine, uniform griiin of the wood, the gmwth 111 diameter is 

 remarkably uniform until the tree reaches the age of about one hundred years. From this ou it 

 decreases rapidly and is scarcely more than one-fourth as great at one hundred and eighty as it 

 is at one hundred. The rate of growth in volume increases steadily up to the one hundredth year, 

 reaching a maximum of over 1.2 cubic feet per year, but decreases, though very slowly, from that 

 time forward, being only about one-half cubic foot per year when the tree reaches the age of one 

 hundred and eighty years. 



Half of growth of Longleaf Pine. 



Age. 



10 

 20 

 30 

 40 

 50 

 60 

 70 

 80 

 90 

 100 

 120 

 140 

 160 

 180 



Diam- 

 eter 

 with 

 bark 



(breast 

 high) 



Inches. 

 2.0 

 3.8 

 6.5 

 7.0 

 8.1 

 9.6 

 11.5 

 13.0 

 14.5 

 16.0 

 18.0 

 19.5 

 20.5 

 2L3 



Length 

 of tim- 

 ber, 

 with 

 upper 

 diame- 

 ter of-S 

 inched. 



Feet. 



Height 

 of tree. 



Feet. 

 9 



23 

 37 

 48 

 56 

 62 

 67 

 72 

 76 

 80 

 87 

 93 

 98 

 103 



Volume. 



Oil. feel. 



0.12 



1.20 



3.35 



7.00 



10.75 



15.26 



24. 16 



33.18 



43.57 



55.85 



70.87 



90.44 



112.30 



122. 00 



Log. 



Ou.feet. 



5.61 

 9. :!0 

 13.99 

 23.11 

 32. 27 

 42.66 

 54.94 

 75.87 

 95.49 

 111.. 50 

 121.20 



Periodical accretion. 



Decade. 



First 



Second 



Third 



Fourth 



Filth 



Sixth 



.Seventh 



Kixlilh 



Ninth 



Tenth 



Eleventh and twelfth 



Thirteenth ami fourteenth... 



Fifteenth and sixteenth 



Seventeenth and eighteenth . 



Diame- 

 ter. 



Inches. 

 1.4 

 1.8 

 1.6 

 1.2 

 1.2 

 1.4 



i.a 



1.6 

 1.2 

 1.1 



1.8 

 1.6 

 .8 

 .75 



Area of 

 Height, cross sec- 

 tions. 



Feet. 



9 



14 



14 



11 



8 



6 



5 



5 



4 



4 



7 



6 



Sq 



foot. 



0.01 

 .04 

 .07 

 .08 

 .08 

 .12 

 .17 

 .19 

 .16 

 .17 

 .30 

 .29 

 .10 

 .12 



Average 



annual 



accretion 



Om. 



;. feet. 

 0.12 

 1.08 

 2.15 

 3.71 

 3.69 

 4.51 

 8.90 

 9.02 

 10.39 

 12. 28 

 21.02 

 19.62 

 15.86 

 10.70 



Current 

 accretion. 



Ou. 



feet. 



0.01 

 .06 

 .11 

 .18 

 .21 

 .25 

 .35 

 .41 

 .4S 

 .50 

 .64 

 .69 

 .70 

 .67 



Cu. feet. 



0.01 



.11 



.21 



.37 



.37 



.45 



.89 



.90 



1.04 



1.23 



1.05 



.98 



.79 



.53 



