342 



THE TIMBERS OF THE WORLD 



Table XL. 

 Tensile Experiments. 



Table XLI. 

 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 1 1 

 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 tons and 38-5 tons; and one 

 piece — 12x12x15 inches in length — bore 481 tons, or 3-34 tons per 

 square inch of base. 



£=771030. 5=2247. 



