Elongation of 10" sections: 1".65, 1".72, 1.70, 1.69, 1.81, 1.90

(2.50 at fracture), 1".70.

Diameter at fracture, 1".58; area, 1.96 square inches.
Contraction of area, 38 per cent.

Fracture, fibrous.

No. 595.

Mark on bar, S 20.

Diameter, 2.01; sectional area, 3.17 square inches.

Gauged length, 80".

Elongation of 10" sections: 1".62 (2".34 at fracture), 1".75, 1".82,

1.81, 1.81, 1.75, 1".79.

Diameter at fracture, 1".59; area, 1.99 square inches.

Contraction of area, 37 per cent.

Appearance of fracture fibrous, with some cinder at center.

DOUBLE-REFINED WROUGHT IRON.

Mark on bar, S 218.

No. 596.

Diameter, 2".01; sectional area, 3.17 square inches.

Gauged length, 80".

Elongation of 10" sections: 1".90, 1".95, 2".19, 2".08, 2".01, 2".09, 1.97, 2".13.

Diameter at fracture, 1".54; area, 1.86 square inches.

Contraction of area, 41 per cent.

Fracture fibrous; broke outside 80" section, 2" from face of holder

jaws.

No. 597.

Mark on bar, S 219.

Diameter, 2".01; sectional area, 3.17 square inches.

Elongation of 10" sections: 2".19, 2′′.26, 2′′.49, 2′′.40 (2′′.95 at fracture), 2.90, 2.44, 2".72.

Diameter at fracture, 1′′.50; area, 1.77 square inches.

Contraction of area, 44 per cent.

Fracture fibrous, cup-shaped.

No. 598.

Mark on bar, S 220.

Gauged length, 80".

Diameter, 2".01; sectional area, 3.17 square inches.

Elongation of 10" sections: 2.10, 2′′.06, 2′′.21, 27.38, 2′′.39 (3′′.35 at fracture), 2.30, 2".13.

Diameter at fracture, 1".50; area, 1.77 square inches.

Contraction of area, 44 per cent.

Fracture fibrous, cup-shaped.