372 



TIMBER AND TIMBER TREES. 



[chap. 



Specimens 19 to 24, with the early layers, also 25 

 to 30, with the later layers of wood, were taken from a 

 log of the same dimensions as the last, and under 

 precisely the same conditions as those referred to in 

 Tables CLI. and CLIL, the results being nearly as 

 before; that is, specimen 20, or the second piece from 

 the butt-end of the early growth, and specimen 25, or 

 the butt length of the later growth, are the two strongest 

 pieces of the respective series. We also see in the 

 mean results of the experiments that the strength of 

 the inner is to the outer wood as 733 : 755. Thus the 

 outside is as before, the strongest. 



Table CLV. 

 Tensile Experiments. 



Table CLVI. 

 Vertical or Crushing Strain on cules ofz inches. 



