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TABLE 1.-Of the TENSILE STRENGTH OF MATERIALS.

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drilled plate, annealed or not

83,485

78,893

81,189 36.24

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double-riveted joints, punched holes, annealed plate,

96,163

87,606

91,885 41.02

steel rivets

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102,593

72,408

90,000 40 1 Kirkaldy.

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97,150 67,686

81,960 36.6

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دو

mean of the two

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99,870 70,047

85,977 38.4

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53,245 23 77 H. Sharp.

48,272

36,557

42,380 18.92 Hawks and Crawshay.

48,765

33,376

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56,089

45,002

48,160 21 5

Captain Brown.

83,000 78,430

78,430

14,270 6.37 80,214 35.8

E. Clark.

Telford.

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12,716

23,468 32,077 23,461 96,300

73,185 32 67 Anderson.

1,273 0.568 Muschenbroek.

16,000 7-142 Hodgkinson and Fair

bairn.

27,916 12 46

Owen, &c.

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TABLE 1.-Of the TENSILE STRENGTH OF MATERIALS-continued.

Breaking Weight per Square Inch.

Material.

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copper 2, zinc 1

Gun-metal, copper 9, tin 1

Muntz-metal, copper 6, zinc 4

Copper, cast, pure

Copper bolts, 24, 2, 1, and inch diameter

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Kind of Wood.

Max.

Min.

Mean.

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TABLE 1—continued.—TENSILE STRENGTH OF TIMBER.

Authority.

Kind of Wood.

Max. Min.

Authority.

Mean.

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14,186 6-3

19,500 8.7

17,850 15,784 17,077 7.6

2.

12,000 5.4 Muschenbroek. Lignum-vita

17,709 7.9 Muschenbroek. 22,200 9.8 Bevan.

Muschenbroek.

lbs.

lbs.

lbs.

tons.

Holly

Bevan.

Lance-wood

6. Barlow. Bevan.

Larch

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Bevan.

Rondelet.
Bevan.

11,800 5.3

3. Barlow.

Mahogany

8,900 4.0 10,220 4.6

8,224 7,950 8,041 3.6

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3. Barlow.

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15,500 6.9 20,000 9.0 Muschenbroek.

4,973 2.2 Muschenbroek. 12,100 5.4 Bevan. 10,500 4.7

13,300 6.0 Muschenbroek. 14,000 6.3 Bevan.

18,100 17,600 17,850 8.0 14,000 12,300 12,900 5.8

7,000 3.1

15,000 6.7

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10,000 4.5 Muschenbroek.

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Norway

Plane-tree
Plum-tree
Poplar

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Sycamore Teak

Bevan.

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12,008 8,889 10,389 4.6 6. Barlow. 19,800 15,000 17,400 7.8 2. Bevan. 17,300 7.7 Muschenbroek. 13,950 6.2

Rondolet.

Bevan.

Pear-tree

11,537 8,834 9,822 4.4

3.

Barlow.

Pine, St. Petersburg

13,300 5.9

Bevan.

7,818 3.5

Muschenbroek.

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14,300 12,400 13,350 6.0

Bevan.

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11,700 5.2

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11,800 5.3 Muschenbroek.

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