Substances.

Tensile Strain per Sq. Inch for limit of Elasticity.

RatloofStraln to that caus-ing Rapture.

Lbs.

Beech..................

3,355

.8

Cast-iron, English...

4,000

.22

" American

5,000

.2

Oak...........................

2,856

.23

Steel plates, blue tempered..............

93,720

.62

Steel wire..........

35,700

.6

Yellow Pine.............

3,332

.23

Wrought-iron. or'dy

17,000

.3

Substances.

Tensile Strain per Sq. Inch or limit of

Elasticity.

RatloofStrain to that caus-ing Rupture.

Lbs.

Wrought-lron, Swe.

24,400

.34

"Eng.

l8,850

.35

22,400

.35

" Am.

21,000

.26

Wrought wire. No. 9, unannealed............

47,532

.49

Wrought wire. No. 9, annealed................

86,300

.45