24 



throughout the wood. The bark is stringy to the smaller limbs 

 and branches. 



4. MOUNTAIN ASH. E. sieberiana. A tree attaining a 

 maximum height of 150 feet and diameter of 5 feet, which grows 

 best in mountain regions. The wood is strong, light, tough and 

 elastic, but is not durable. It splits easily and is suitable for in- 

 side work but is not durable when not protected from the 

 weather. 



5. TALLOW WOOD. E. microcorys. One of the bulkiest 

 of Australian trees adapted to planting in humid regions and at- 

 tains a maximum height of 300 feet and diameter of 10 feet. The 

 wood is very durable 5and has a greasy texture which makes it 

 suitable for ball-room flooring. 



6. RED GUM. E. rostrata. A large tree, up to 250 feet tall 

 and 14 feet in diameter, which is one of the best to resist wet 

 tropical heat. The wood, which is very hard and dense, resists 

 the teredo and termites and has unsurpassed durability. 



7. SUGAR GUM. E. corynocalyx. One of the best all 

 around trees which is suitable for a dry region. It attains a 

 height of 150 feet and diameter of 5 feet. The wood is straight 

 and even grained and is durable. Posts of this wood have lasted 

 for 15 years in the ground. It is one of the strongest eucalypts 

 and the seasoned wood is better than the best grade of second- 

 growth hickory. The sweetish foliage attracts cattle and sheep 

 which browse on the lower branches and seedlings. 



8. GRAY GUM. E. tereticornis. A tree which grows to 

 150 feet in height and 6 feet in diameter and is usually found on 

 humid flats. It can stand considerable drought but becomes 

 stunted in rocky exposed localities. The wood is strong, hard, 

 heavy and quite durable. 



SUMMARY. 



The experiment, while successful so far as actual tree survival 

 is concerned, is surrounded by such adverse conditions that the 

 different species probably do not show up to their best advantage 

 in the way of growth and yield. The results, however, show that 

 the Blackbutt has surpassed all of the others in growth, produc- 

 ing the equivalent yield of 4^ cords per acre in five years, and 

 the tabulated yields of the other species show what may be ex- 

 pected from them under similar growing conditions. 



It is planned to remeasure the trees on the plot in 1921, and 

 thereafter every five years, so as to obtain complete figures on 

 current growth and yield. 



Honolulu, T. H., December 30, 1918. 



