320 



TIMBER AND TIMBER TREES. 



[chap. 



satisfactory as before, in consequence of the sudden 

 falling off in strength in the 21 -inch piece; still there 

 is, perhaps, sufficient to indicate that the maximum of 

 strength would be in a length of about 20", in which 

 case the proportion of base to length would still be as 

 16:20 or 4: 5. 



Table CXXXI. shows the result of some vertical 

 tests on pieces 6"x 6" and even larger, but the lengths 

 are not in the same proportion to the scantlings given 

 in former tables, there not being any means at my 

 disposal for holding pieces of greater length than 30 

 inches. Whether the result would have been the same 

 if this had been possible, cannot therefore be determined 

 by the experiments herein referred to. 



TABtE CXXV.— Fir (Dantzic). 

 Transverse Experitnents. 



Nos. I, 2, and 3 broke with a scarph-Uke fracture, 10 inches in length ; 4 and 5 a little 

 longer and more splintery ; 6 about 15 incheS) and also splintery. 



