. Bulletin. Forests and forestry -- United States. (3. Mark, < 3. Lonf;lp:if pine. Leugth. 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 /^;â-â-; = 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 = inch-pounds. El. Res., July Load. Deflec- Micro- 20,1891. tion. meter. h. m. 2 58 300 .042 0. 958 â J- 0 1,000 .208 1 .324 â¢y 2,000 .404
. Bulletin. Forests and forestry -- United States. (3. Mark, < 3. Lonf;lp:if pine. Leugth. 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 /^;â-â-; = 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 = inch-pounds. El. Res., July Load. Deflec- Micro- 20,1891. tion. meter. h. m. 2 58 300 .042 0. 958 â J- 0 1,000 .208 1 .324 â¢y 2,000 .404 3 2,400 .4S1 4 2, 800 . .WS ' 5 3,200 .040 8 3, 000 .721 7 4,000 .815 8 4,400 .926 1. 842 9 4,800 13 5,180 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. I> Time. Length. Height. Breadth. Min. Inchea. inches. Jnclieg. . 15 10 Deflec- tion. Founds.\ Inches. 5,180 1,544 3,300 StriMigtli per square inch.(/) Voundt. 5,6eo Modulus of elas- city.(c) Resilience in inch- pounds per (r) Pounds. 1, Mark. Long-leaf pine 3 3 1 "White pine: 116 1 3 Crushing endwise. Dimensions. Height. Inches. i a. 1 I" Cross Sq. in. 112. 87 Crushing load. Pounds. 77, 71K) Strength per square inch. Crushing across grain. Dimensions. HeigM- ^^^Zl. Founds. 0, 040 3,480 Inches. Inches. ( I Sg. in. f I 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. Breaking load. Pounds. 11,400 Strengtli per square inch. Pounds. 11, 680 9,880 t^^ata. Total aliearing area. St/, in. 4. IC 4. 02 Breaking load. Founds. 2,
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