XXXV.] 



PITCH PINE. 



289 



TABLE CLV. PITCH PINE (AMERICAN). 



Transverse Experiments. yd Example. 

 (Butt to top, outer part of the tree. Fig. 32^.; 



REMARKS. No. 13 broke short and split ; 14, curl in the grain and broke short ; 15 

 and 1 6 broke short and split ; 17 and 18 broke with short fracture. 



E = 815070. S = 2546. 



Specimens Nos..i3 to 18, with the later layers or 

 growth, were taken from the outside of the same plank, 

 the object being to ascertain in the two sets of experi- 

 mentsTables CLIV. and CLV. in which part of the 

 length the maximum of strength lay. Table CLIV. 

 shows that in the early layers it is in specimen 8, the 

 second piece from the butt-end ; and Table CLV. 

 shows that in the wood of later growth it is in speci- 

 men 15, the third piece from the butt-end. We also 

 see in the mean results of the experiments that the 

 strength of the inner is to the outer wood as 889 : 970. 



Further experiments on the transverse strength of 

 the inner and outer layers of wood of another Pitch Pine 

 tree were then carried out, with the following results : 



u 



