122 



NEBRASKA STATE HOIiTICULTURAL SOCIETY. 



Table 3. — Aviount of hearticood in trees of various diameters. 



Diameter Breast 



High Outside of 



Bark 



Inches 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



No. of trees measured 



Cottonwood 



Diameter 



Inside 



Bark 8 



Feet rligh 



Inches 



0.7 



1.5 



2.4 



3.3 



4.1 



4.9 



5.8 



6.6 



7.5 



8.3 



9.2 



10.0 



10.9 



11.7 



12.6 



13.4 



14.3 



15.1 



Diameter 

 of Heart- 

 woods 

 Feet High 



Inches 



0.6 

 1.3 

 1.9 

 2.6 

 3.2 

 3.9 

 4.5 

 5.2 

 6.9 

 6.5 

 7.2 

 7.8 

 8.5 

 9.2 

 10.0 

 1).8 

 11.6 



Black Walnut 



Diameter 

 Inside 

 Bark 8 



Feet High 



49 



Inches 



0.5 

 1.4 

 2.2 

 3.1 

 3.9 

 4.8 

 5.7 

 6.5 

 7.4 

 8 2 

 9.1 

 10.0 



Diameter 

 of Heart- 

 wood 8 

 Feet High 



Inches 

 0.2 

 .9 

 1.5 

 2.2 

 2.8 

 3.5 

 4.2 

 4.8 

 5.5 

 6.2 

 6.8 

 7.6 



23 



Hardy Catalpa 



Diameter 



Inside 



Bark 7.5 



Feet High 



Inches 



0.8 

 1.7 

 2.5 

 3.2 

 3.9 

 4.7 

 5.5 

 6.2 

 6.7 

 7.2 



Diameter 

 of Heart- 

 wood 7.5 

 Feet High 



Inches 



0.7 

 1.5 

 2.2 

 2.9 

 3.6 

 4.2 

 4.8 

 5.5 

 6.0 

 6.6 



26 



The preceding table shows that hardy catalpa has throughout a high 

 percentage of heartwood. This is one of the many excellent qualities 

 that make it so valuable as a post timber. Green ash develops no heart- 

 wood for some years, which accounts for the short life of posts from 

 young trees. Honey locust begins to develop heartwood early, and the 

 amount, though small at first, increases rapidly with age. Black walnut, 

 though noted for its durability, does not develop enough heartwood to 

 make a durable post until it is about 7 inches in diameter. Cottonwood 



