XXIX.] 



RIGA FIR. 



249 



TABLE CXXXII. 

 Vertical or Crushing Experiments. 



E = 752420. S = 1575. 



The Riga is of slower growth than the Dantzic Fir, the 

 difference being about 0*4 layers per inch in diameter 

 (vide Table II.) ; this, in view of the theory previously 

 set up, indicates that it is inferior to the Dantzic Fir. 



Contracts for the supply of Riga Fir timber, and 

 hand-masts for the royal navy, are made annually; 

 the quantities of each kind varying according to the 

 requirements of the several dockyards. They are 

 received under the following specification and con- 

 ditions, viz., the timber at per load of 50 cubic feet, 

 and the hand-masts at each. 



