XXXIX.] 



CARBONISING. 



323 



I examined these specimens in 1863 and 1864, and 

 they all appeared to be as strong and sound as when 

 first prepared ; they were therefore returned to their 

 places. I again examined them in 1867, and then 

 tested them for transverse strength. The results are 

 given in the following tables : 



TABLE CLXVI. CARBONISED BRITISH OAK. 



REMARKS. No. 3 broke with scarph-like fracture, 5 inches in length ; 10 broke in 

 three pieces, each with scarph of 6 inches ; 7 broke with long splintery fracture ; 8 broke 

 with splinters, 12 inches in length; 9 broke with splinters, 9 inches in length; n, lost; 

 12 broke off short in three pieces. 



