Tensile Strength of Colonial Timbers. 



RESULTS OF EXPERIMENTS. 

 I. Messmate. Eucalyptus obliqua. Bullarook Forest. 



Lbs. per sq. in. 



a. 8500. Broken. Rather short fracture. 



b. 8500. Broken. Short fracture. 



c. 8200. Broken. Short fracture. 



The wood was well seasoned, clean, but not quite free 

 from shakes. This defect should not, however, affect its 

 tensile strength to any appreciable extent. 



II. Bluegum. Eucalyptus globulus. Tasmania. 



Lbs. per sq. in. 



a. 26,500. Pulled through entirely. 



b. 24,000. Cracked, but not broken. The lever at 24,000 



lbs. reached its limit. 



c. 29,800. Broken. Very long fracture. 



d. 26,700. Pulled through. This specimen was 12 in. 



long. 



A very good, well-seasoned specimen of this wood, beauti- 

 fully clean and straight in grain. 



Lancewood, tensile strength ... .... 23,400 



Beech 22,000 



These are the highest values in the tables of Ranhine and 

 Molesworth. 



III. Whitegum. Eucalyptus. Bullarook Forest. 



Lbs. per in. 



a. 29,700. Entirely pulled through. 



b. 28,900. Broken. Very long fracture. 



c. 25,000. Broken. Long fracture. This last was not a 



fair test, as the specimen was not -hung 

 perfectly straight, and so cracked on one 

 side before giving way. 



This was a very fine, clean, well-seasoned piece of wood. 



