One foot in length. Fixed at one end; Weight suspended from the other.

MATERIALS.

Solid External Diameter.

Hollow Internal Diameter.

Breaking Weight.

Breaking Weight for 1 inch external Diameter and pro-port innate Inter-nal Diameter.

WOODS.

Ins.

Ins.

Lbs.

Lbs.

Ash..............................................

2.

685

86

"..............................................

1

1.

604

75

Fir*..............................................

2.

....

772

97

White pine....................

1.

....

75

75

"..............................................

2.

...

610

76

METALS.

....

Cast iron, cold blast..................

3.

...

12000

444

STONE WARE.

Rolled pipe of fine clay............

2.87

1.928

190

3