54 



Table IV. — Douglas, Oregon, Washington, 



[Ultimate breaking stress 

 RECOMMENDED 



RESULTS OF 



U.S. Ordnance Depart- 

 ment, Capt. T. J. 



Rodman. 

 U.S. Tenth Census 



W.B.Wright 



Oregon and California 



R.R. 

 Robert H.Thurston .... 



U.S. Ordnance Depart- 

 ment, Watertown 

 Arsenal. 



H.T. Bovey 



John D. Isaacs, South- 

 ern Pacific Ry. 



Oregon yellow fir. 



Oregon red fir 



Oregon white fir. . 

 Red and yellow 

 Douglas fir. 



Red fir 



Yellow fir 



Douglas fir 



Oregonsugarpine . 



Oregon pine 



California spruce. 



Oregon pine 



Oregon spruce 



13, 633-16, 833 



Douglas fir, 71 



tests. 



Douglas fir 



Douglas fir 



2, 4S5-18, 856 



12, 867 

 14,533 



10, 872 

 11,550 

 16, 600 

 11.000 



13,810 

 16, 160 



11,612 



15, 900 



7, 188-9,217 



4,880-9,800 



9,200-11.500 

 9, 200-12, 800 



7,083 

 6,644 



6,099 

 6, 132 

 3,085 

 3,391 



8,597 

 5,772 



6,000 



RESULTS OF 



