280 TIMBER AND TIMBER TREES. [CHAP. 



We are thus enabled to compare the strength of the 

 earlier and the later growth of this wood. 



TABLE CXLIX. YELLOW PINE (CANADA). 

 Transverse Experiments. 2nd Example. 



The mean results of the experiments are as follows, 

 viz. : 



The centre piece Q s.g. 430 broke with 360 Ibs. E = 785170. S = 945 



,, next pieces i and i' 562 480 ,, E = 902950. S = 1261 



2 2 ' 584 537 E - 577020. S = 1425 



outer ,, 3,, 3',, 567 ,, 493 = 822740.8-1294 



The mean of the 7 pieces being E = 902950 and S = 1267. 



In the above example, there is something like a 



