W. G.

Number

Iron

In lbs. per sq foot.

Copper

In lbs. per sq. foot.

Brass

In lbs. per sq. foot.

1

12

14

13

2

11

13

12

3

10

12

11

4

9

11

10

5

8

10⅛

9⅝

6

8

94

9

7

7

8

8

8

6

7⅝

7⅛

9

6

7

6

10

5⅝

6

5

11

5

5

5

12

4

5

4⅝

13

3⅝

4

4

14

3 5/16

4

3

15

3

3

3

16

2

3

2⅞

17

2

2

2⅝

18

2

2

2⅛

19

1

2

l⅞

20

1

1

l

21

1 3/8

1

1

22

1

1 3/8

1 3/8

23

1⅛

1 3/16

1 3/16

24

1

1

1

25

0⅞

0⅞

0⅞

26

0

0 15/16

0 3/6

27

0 11/16

0

0

28

0⅝

0⅝

0⅝

29

0 9/16

0 9/16

0 9/16

30

0

0