18,5 Valencia: Commercial Philippine Timbers 495 
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Fic. 4. Apparatus used for testing small clear beams. 
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Fic. 5. Apparatus used in making tests of compression parallel to grain. 
rests upon the weighing table of the machine. In tests 
Where the modulus of elasticity is desired, two yokes, 6 inches 
apart, are placed on the specimen. The load is applied by mov- 
ing the crosshead down very slowly. The decrease in length 
~ between the yokes is measured by means of a deflectometer which 
