156 



TIMBER AND TIMBER TREES. 



[chap. 



Table XLII. 

 Tensile Experiments. 



Table XLIII. 

 Vertical or Crushing Strain on cubes of 2 inches. 



Contracts are annually made for the supply of 

 English Elm timber for the royal navy, according to the 

 following specification and conditions, the quantities of 

 the several classes, and the quantity required for each 

 of the dockyards, of course varying from yeai: to year^ 

 to suit the works in hand. 



