XXVIII.] 



RIGA FIR. 



333 



Table CXXXIV. 

 Vertical or Crushing Experiments on cubes of— 



The Riga is of slo-wer gro-wth than the Dantzic Fir, 

 the difference being about 0-4 layers per inch in dia- 

 meter {vide Table I.) ; 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 re- 

 ceived under the following specification and conditions, 

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

 hand-masts at each. 



See footnote, p. 329. 



