(See Table IX.) The values derived from tests of small beams of dry material are much greater, approaching 3,000,000 for some of our woods.

These values are small when compared with steel which has a modulus of elasticity of about 30,000,000 pounds per square inch.

(See Table I.) |------------------------------------------------------------------------------| | TABLE I | |------------------------------------------------------------------------------| | COMPARATIVE STRENGTH OF IRON, STEEL, AND WOOD | |------------------------------------------------------------------------------| | | Sp.

| Modulus of | Tensile | Crushing | Modulus | | MATERIAL | gr., | elasticity | strength | strength | of | | | dry | in bending | | | rupture | |-------------------------+----- +------------+----------+----------+----------| | | | Lbs.

per | Lbs.