28 James Mann : 



No. 6 broke short at the bend. Rings vertical. 



Alaga. — All the specimens of Alaga broke, but four of them 

 bent to an angle of 45 deg. before breaking, leaving a fair 

 permanent bend away from the fracture. 



Maclave. — All the specimens bent to an angle of 30 deg., 

 then broke. Slight permament bend in four of them. 



Tamanau. — ^No. 1, which was a diagonal specimen, bent well, 

 but split on the tension side; the others broke without per- 

 manent bend. 



Ilimo. — Four of the specimens broke before the steam was 

 applied, the other two took on a permanent " set " of about 

 15 deg. after remaining without steam for twenty-four hours. 

 In this case the three-quarters by three-eighths pieces were 

 replaced by specimens three-quarters of an inch square, and 

 were steamed for five hours. After steaming for an hour and 

 three-quarters, No. 5, which was a diagonal-ringed piece, broke, 

 Xo. 6, a similar piece, bent most, the other four remaining at 

 an angle of about 15 deg. With the exception of this set, none 

 of the specimens required steaming for more than fifteen 

 minutes. 



Under these severe conditions the six varieties may be classed 

 for bending as follows : — 



Other Mechanical Tests. 



The examination of timbers as to their adaptability for 

 economic purposes requires that they should be submitted to 

 several tests. For instance, timber for engineering purposes 

 should be strong and durable ; for architecture it should be 

 strong, durable, comparatively light, with variety in figure, 

 capable of undergoing certain treatment such as bending, polish- 

 ing and glueing, and of resisting splitting when either nailed 

 or screwed ; excessive expansion and contraction during at- 



