26o 



TIMBER AND TIMBER TREES. 



[CHAF. 



Table XCIX. 

 Tensile Experiments. 



Table C. 

 Vertical Experiments on cubes of— 



Nos. 28 TO 36. — Four more pieces — each 2x2x2 inches — tried under the 

 vertical pressure, took, on the average, 13-937 tons, or 3-484 tons to the square 

 inch, to crush them. Two pieces, each 3 x 3 — the one 11 inches, the other 16 

 inches in length — bore 27- tons and 25-5 tons. Two other pieces, each 4x4 

 inches — the one being 8 inches, the other 13 inches in length — bore respectively 

 47-75 'ons and 38-5 tons ; and one piece — 12 x 12 x 15 inches in length — bore 

 481 tons, or 3-34 tons per square inch of base. 



