Article.

Pounds in cubic foot.

Cubic feet in a ton.

Article.

Pounds in cubic foot.

Cubic feet in a ton.

Cast Iron ................

450

4.97

Plaster of Paris. -----

105

21.3

Wrought Iron ...........

486

4.61

Granite ..............................

139

16.1

Steel ........................

489

4.57

Sea-water ..........................

64

34.8

Copper ...................

555

4.03

Fresh water .....................

62

35.9

Lead ......................

707

3.16

Ice ..................................

58

38.6

Brass .......................

537

4.16

Gold .............................

1013

2.21

Tin...................

456

4.91

Silver ...........................

551

4.07

White Pine ................

29

75.6

Coal, anth .....................

53

42.3

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

33

66.2

-----, bit.............

50

44.8

Mahogany ...............

66

33.8

Charcoal ........................

18

123

Marble .....................

141

15.9

Coke................

31

70.8

Mill-stone .................

130

17.2

Zinc .........................

450

4.97

White Oak...........

45

49.5

Live Oak .................

70

70