XXXIV.] 



YELLOW PINE. 



283 



And of the tensile : 



The pieces I and I ', s.g. 543, broke with 1,925 Ibs. 



2 ,, 2', ,, 548, ,, 2,510 



3 3'. 559, 2,450 

 ,t 4 4', 563, 2,152 ,, 



We find here that the denser layers are at 4 and 4', 

 near the outside of the log, but we are not sure as to the 

 amount of wood removed in hewing it, so that it may 

 perhaps compare with the specimens in Table CXLIX. 

 as to position of growth. It will be seen that the point 

 of greatest transverse strength is at or near 3 and 3', and 

 that of the tensile at or near 2 and 2'. 



There is a marked difference in the strength of the 

 wood on the two sides of this tree, since I, 2, 3, and 4 

 have a mean transverse strength of 556, and i', 2', 3', and 

 4' of 453 only, the difference being 103, or about 18 per 

 cent. This is further remarkable in the tensile strength, 

 since I, 2, 3, and 4 have a mean strength of 2599, and 

 i', 2', 3', and 4' of 1920 only, the difference being 679, 

 or about 26 per cent. 



TABLE CLI. 

 Tensile Experiments. 



