Value of E in lbs. per square inch.

Box....................................................

1,856,000

Chestnut, dry......................................

1,147,500

Fir, Baltic...........................................

1,823,000

" New England.............................

1,328,000

Larch..................................................

1,363,500

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

1,424,250

Oak, English......................................

1,714,500

" Dantzic......................................

1,998,000

Pine, Pitch..........................................

1,252,200

,, Red ..........

1,840,000

,, Yellow, American ..................

1,600,000

Teak, Indian........................................

2,167,074

Iron, Wrought......................................

22,400,000

" Cast............................................

17,000,000

The timber from which the following experiments were made was grown in the Department of Vosges, in France, and appears to have been of less strength than that used in other experiments.

Table II. - From The Experiments Of Mm. Chevandier And Wertheim.*

Description of Wood.

Specific Gravity.

Modulus of

Elasticity per square inch.

Load corresponding to the Limit of Elasticity per square inch.

Force per square inch capable of producing

Rupture.

lbs.

lbs.

lbs.

Acacia..........................

.717

1,794,812

4,534

11,279

Fir ........

.493

1,583,314

3,062

5,945

Hornbeam.....................

.756

1,543,632

1.823

4,253

Birch ......

.812

1,418,326

2,300

6,116

Beech............................

.823

1,394,432

3,295

5,078

Oak (pedunculata) .......

.808

1,390,734

...

9,231

,, (sessiliflora)............

.872

1,311,086

3,341

8,050

Pine (silvestris)............

.559

802,324

2,323

3,627

Elm........

.723

1,657,417

2,620

9,942

Sycamore..................

692

1,655,283

1,620

8,761

Ash........

.697

1,594,977

2,772

9,643

Alder............................

.601

1,576,061

1,594

6,457

Aspen-tree...................

.602

1,530,262

1,472

10,240

Maple..........................

.674

1,452,746

1,519

5,092

Poplar.........................

.477

735,618

1,432

2,802

The elastic limit was assumed to have been attained when the permanent set was 1/20000 th part of the original length.