XXIX. | RIGA FIR. 249 
TABLE CXXXII. 
Vertical or Crushing Experiments. 
SeS|soS Area | Weight | 25 Ditto on 
= E beoe Scantling. in square | of the 8 = Sue ayy square 
Z ° 3. ye 2 inches. | specimen, es inch. 
Inches. Inches. lbs. oz. Tons. Tons. 
25 I oI vet 9°875 | 2°469 
26 2 Oo 2 bie 8-437 | 2°109 
27 3 oO 3%| ... | 11500] 2°875 
28 4 Oo 4%)... g‘000 | 2250 
29 5 o 7 .. | 10°§00| 2°625 
30 6 o 8%! ... | 11250) 2°812 
31 7 o 10 w= [T1125 | 2°781 
32 8 2x2 4 0 10%] ... | 11000] 2°750 
33 9 0 12 10°000 | 2°500 
34 10 0 15 8000 | 2000 
35 I 11 9°750 | 2°437 
36 12 1 3 I1‘I25 | 2°781 
37 | «18 I 6 9°875 | 2°469 
38 24. 1 8% 6°875 | 1°719 
39 | 30 2 5% 7'375| 1°844 
40 12 28 1 647 | 367°80| 3°678 
41 15 \ \ 27 7 506 | 214°70} 2°147 
42 | 18 |¢ 9%%10%] 100 4) 33 4 | Son | 2a5-40| 2-454 
43) 21 48 3 34 | 245'40|) 2°454 
44 18 46 6 646 | 307°00| 2°784 
45 21 10% x 10%| 110'25 54 11 654 | 307°00; 2°784 
| 3 a 3 | Gl |e] 2b 
° 04 | 378°72 | 2°630 
48 | 30 Sener Ee 92 6 | 593 | 396°28| 27752 
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. 
