i6 



(8.) Guapinol. 24-inch supports. An inferior sample, knotty 

 near the middle, checked on top, and with a few worm holes. 

 Broke under 1,600 pounds with a deflection of 0-699 inch and with 

 a few splinters on tension side. 



(9) Guayabo de Monte. 24-inch supports. The test piece was 

 planed from a green limb. It was checked and knotty on either 

 side of middle line in tension side. The first rupture occurred on 

 account of cross-grain at 660 pounds, with a deflection of 0-477 

 inch. Ruptured with only one splinter across the bottom side. 



(ii.) Jenisero. 24-inch. Broke at 1, 600 pounds, with a deflec- 

 tion of 0426 inches. When under 1,600 pounds load, brought 

 the scale up when pulling the lever arm, but immediately after- 

 wards broke suddenly in two splinters. It evidently is very brittle. 



(1 8.) Moran. 1 5-inch supports. A very sound and beautiful 

 natural-colored piece of wood. Ruptured in light splinters under 

 2,600 pounds, with a deflection of 0-432 inches. Remained un- 

 broken and could have still shown tenacity in successive ruptures. 



(20.) Nancite. 32-inch supports. A good sample. Broke 

 square on tension side, in two pieces, and very suddenly, after 

 having offered elastic resistance to 2,200 pounds, and deflected 

 1-0765 inches. 



(23.) Arco. 24-inch. Straight-grained sample, with two knots 

 on bottom side. Broke at 2,000 pounds, with a deflection of 0-679 

 inches. Second rupture occurred under 1,100 pounds load, with 

 a deflection of 1-116 inches. Ruptured with close splinters on 

 tension or bottom side. 



(26.) Quiebra hacha negro. 25-inch supports. Excepting a 

 light streak of sap wood on bottom side, where it first gave away, 

 it was a very sound sample. Its first rupture occurred when under 

 2,450 pounds, with a deflection of 1-693 inches. A second rupture 

 occurred at 2,550 pounds, with a sudden crash and with a deflec- 

 tion of 2-080 inches. It is worth observing that the second rup- 

 ture occurred with a larger stress than in the first one. The very 

 finely intermingled narrow and regular splinters across the bottom 

 side very fairly exhibit the high tenacity, ductility, as I may be 

 allowed to say, and the uniformity of strength, cohesion and grain 

 of this peculiar wood. Its rupture could very well be taken as the 

 standard rupture of tough woods. 



(27.) Quita-Calson. 21 -inch supports. Season-checked on top, 



