(3. 



Mark, < 3. 



Lonf;lp:if pine. 



Leugth. 60.0 inches. 

 Height, 3. 50 inches. 

 Breadth, 3. 72 inches. 



[Number anuuiil rings per inch 



56 



CROSS BREAKING TEST. 



Strength of extreme fiber, 



3 W I 

 where /^ ;—-—-; = 10,230 pounds per square inch. 



Modulus of elasticity =1,700,000 pounds per square inch. 



Total resilience =.5,110 inch-pounds, Kl. Res., 1,780. 



Kesilieuce, per cubic inch =6..54 inch-pounds. El. Res., 2.28. 



J>efIccttoTv in inclies. 

 FINAL RECORD OF TIMBER TESTS. 



Mark. 



Lons-leaf pino 



3 



3 



1 



Wliite pine : 



IIG 



1 



3 



Percent- 

 age of 

 moisture. 



Cross bending tests. 



Deflec- 

 tion. 



Founds. \ Inches. 

 5, 180 1, 544 



3,300 



StriMigtli 



per 



square 



inch.(/) 



Voundt. 

 10. 230 



5,6eo 



Modulus 

 of elas- 

 city.(c) 



Resilience 



in inch- 

 pounds per 

 cub. inch. (r) 



Pounds. 

 1. 760. 000 



1, 320. 000 



0.54 



4.11 



Mark. 



Long-leaf pine 



3 



3 



1 



"White pine : 



116 



1 



3 



Crushing endwise. 



Dimensions. 



Height. 



Inches. 



i a. 1 



I" 



Cross 



3.46 

 3.72 



3.73 

 3.73 



Sq. in. 

 1 12. 87 



1 13.91 



Crushing 

 load. 



Pounds. 



77, 71K) 



Strength 



per 



square 



inch. 



Crushing across grain. 



Dimensions. 



HeigM- ^^^Zl. 



Founds. 

 0, 040 



3,480 



Inches. 

 3.73 



Inches. 



( 3.47 

 I 3.93 



3.72 

 3.93 



Sg. in. 

 f 13.63 



I 14.62 



Cruahing 

 load. 



Pounds. 

 10,400 



5,200 



Strength 



per square 



inch. 



Founds. 

 760 



360 



Mark. 



Long-leaf pine 



3 



3 



1 



"Wliite pine : 



116 



1 



3 



Tension teats. 



Size of re- 

 duced sec- 

 tion. 



Sq. i». 



2. .38 

 .41 



Area. 



^q. in. 

 0.971 



Breaking 

 load. 



Pounds. 

 11,400 



Strengtli 



per square 



inch. 



Pounds. 

 11, 680 



9,880 



She.iring t^^ata. 



Total 



aliearing 



area. 



St/, in. 



4.14 

 3.97 



4. IC 

 4. 02 



Breaking 

 load. 



Founds. 



2, 280 

 2,580 



1.700 

 1,600 



Shearing 

 strength. 



551 

 650 



409 

 398 



