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50,000 tensile strength.

55,000 tensile strength.

Table of pressures allowable on boilers made since February 28, 1872-Continued.

45,000 tensile strength.

60,000 tensile strength.

Diame- Thick

1-6, 7,500.

1-6, 8,333.3.

1-6, 9,166.6.

1-6, 10,000.

65,000 tensile strength. 1-6, 10,833.3.

70,000 tensile strength. 1-6, 11,666.6.

ter of ness of boiler. plates.

20

20

20

20

20

20

Pres

per cent Pres- per cent Pres- per cent Pres- per cent Pres- per cent Pres- per cent

sure.

[blocks in formation]
[blocks in formation]

50,000 tensile strength.

55,000 tensile strength.

Table of pressures allowable on boilers made since February 28, 1872-Continued.

45,000 tensile strength.

60,000 tensile strength.

Diame- Thickter of ness of boiler. plates.

[blocks in formation]
[blocks in formation]

1-6, 8,333.3.

1-6, 9,166.6.

1-6, 10,000.

[blocks in formation]

20

20

20

20

20

tional.

additional.

sure.

additional.

per cent Pres- per cent Pres- per cent Pres- per cent Pres- per cent addi- sure.

[blocks in formation]
[blocks in formation]

1-6, 7,500.

50,000 tensile strength. 1-6, 8,333.3.

55,000 tensile strength.

Table of pressures allowable on boilers made since February 28, 1872-Continued.

45,000 tensile strength.

60,000 tensile strength.

1-6, 9,166.6.

boiler. plates.

20

sure.

addi

sure.

tional.

20
addi-
tional.

Diame- Thickter ofness of

Pres- per cent Pres- per cent Pres- per cent Pres- per cent Pres- per cent Pres- per cent

1-6, 10,000.

65,000 tensile strength. 1-6, 10,833.3.

70,000 tensile strength. 1-6, 11,666.6.

20

20

20

20

[blocks in formation]
[blocks in formation]

50,000 tensile strength.

55,000 tensile strength.

Table of pressures allowable on boilers made since February 28, 1872-Continued.

45,000 tensile strength.

60,000 tensile strength.

70,000 tensile strength.

Diame- Thickter of ness of boiler. plates.

1-6, 7,500.

1-6, 8,333.3.

1-6, 9,166.6.

1-6, 10,000.

65,000 tensile strength. 1-6, 10,833.3.

1-6, 11,666.6.

20

20

20

20

20

20

Pres

per cent Pres- per cent Pres- per cent Pres- per cent

Pres

sure.

additional.

sure.

additional.

sure.

additional.

sure.

addi

sure.

[blocks in formation]

tional.

tional.

additional.

[blocks in formation]
[blocks in formation]

boiler. plates.

20

addi

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1-6, 8,333.3.

5,000 tensile strength. 1-6, 9,166.6.

Table of pressures allowable on boilers made since February 28, 1872-Continued.

45,000 tensile strength.

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20

20

20

20

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additional.

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sure.

sure.

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tional.

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