24 



(3 ) Chaperno. d = 0-6278. Turned from a large sample and 

 very sound piece. It rose with a 45 wavy curve up to 104-9 

 inch-pounds when it reached the elastic limit. Went up to a 

 maximum of 124-128 inch-pounds, which kept constant until final 

 rupture, splintered at I7'3. 



(5.) Cortez. d = 0-6278. Turned from a large sample near the 

 heart. Very sound piece. It rose with a 45 curve and slightly 

 wavy but uniform, reaching the elastic limit at 214-82 inch-pounds 

 at an angle of 5 0> 9. Ruptured at 28 and splintered at 41, 

 reaching afterwards a higher moment, which kept constant till 

 final rupture. Fibrous and stiff rupture, shearing a plug of same 

 cross section as the turned part from the shoulder. 



(8.) Guapinol. d = 0-5645. With a slightly parabolic curve 

 at 45 angle, reached its elastic limit at 6 with a 183 inch-pounds 

 moment, which kept constant until first rupture and reached a 

 little higher moment before final rupture. Gave away with wide 

 fibrous splinters. 



(12.) Jicaro-sacaguacal. The test piece was turned from a 

 green limb. It rose with a parabolic line and very much inclined 

 toward the axis of strains reaching at the elastic limit a moment of 

 103-2 inch-pounds. Reached a higher moment, which kept con- 

 stant until final rupture at 155, when it completely broke irregu- 

 lar and stiff. 



(13.) Laurel. ^ = 0-631. Dark color. With a low sloping 

 curve, but uniform, reached the elastic limit at 4 angle and under 

 a moment of 82-268 inch-pounds. This was its maximum resist- 

 ance and kept constant until ruptured at 20. Uniform square 

 rupture around the shoulders without projecting splinters. Gave 

 way entirely at 105 angle. 



(17.) Mahogany, d = 0-6358. A very sound piece, turned from 

 a large sample. It rose with a long wavy line up to 78-779 inch- 

 pounds, its elastic limit at 3 angle. Reached a higher moment ot 

 82- inch-pounds at 6-7 when it ruptured. It splintered at a still 

 little larger moment at 27-6. Fibres wide and stiff, and rupture 

 irregular. 



(18.) Moran. ^ = 0-6256. A very sound piece. With a curve 

 above 45 angle with the axis of strains reached its elastic limit at 

 2 under a moment of 82-27 inch-pounds, which kept constant for 

 I -5, when it rose to 88-95 inch-pounds moment, and gave away for 



