Modulus of Elasticity.
1,170,000 (Thurston).
Modulus of Rupture.
10,000 (Thurston).
Remarks.
The English, Chestnut, Durmast, or Red Oak, Q. robur var. sessiliflora, distinguished by long leaf stalks and short acorn stalks, affords practically similar but lower-rated wood. The two varieties supply the British Oak of commerce. Dantzic, Rigi, and some other European oaks take names from port of shipment. Rubrus is red, but robur is a noun meaning strength; the adjective robustus means "oaken" or vigorous. [p027]
PLATE 6. WHITE ASH (Fraxinus americana).
