The specific gravities to determine the weights of the following-named metals, and the calculations of them, were taken and made by Charles H. Haswell, of New York, for the well-known manufacturers, Messrs. J. R. Brown & Sharpe, of Providence, R. 1. Diameter and thickness determined by American gage: -

No. of

Gage.

Size of each number.

Wire - per Lineal foot.

Plates - per Lineal Foot.

Wrought Iron.

Steel.

Copper.

Brass.

Wrought Iron.

Steel.

Copper.

Trass

Inch.

Lbs.

Lbs.

Lbs.

Lbs.

Lbs.

Lbs.

Lbs.

Lbs.

0000

.46000

.560740

.566030

.640513

.605176

17.26

17.48

20.838

19.688

000

.40964

.444683

.448879

.507946

.479908

15.3615

15.5663

18.5567

17.5326

00

.36480

.352659

.355983

.402830

.380666

13.68

13.8624

16.5264

15.6134

0

.32486

.279665

.282303

.319451

.301816

12.1823

12.3447

14.7162

13.904

1

.28930

.221789

.223891

.253342

.239353

10.8488

10.9934

13.1053

12.382

2

.25763

.175888

.177548

.200911

.189818

9.6611

9.7899

11.6706

11.0266

3

.22942

.139480

.140796

.159323

.150522

8.6033

8.7180

10.3927

9.8192

4

.20431

.110616

.111660

.126353

.119376

7.6616

7.7638

9.2552

8.7445

5

.18194

.087720

.088548

.100200

.094666

6.8228

6.9137

8.2419

7.787

6

.16202

.069565

.070221

.079462

.075075

6.0758

6.1568

7.3395

6.9345

7

.14428

.055165

.055685

.063013

.059545

5.4105

5.4826

6.5359

6.1752

8

.12849

.043751

.044164

.049976

.047219

4.8184

4.8826

5.8206

5.4994

9

.11443

.034699

.035026

.039636

.037437

4.2911

4.3483

6.1837

4.8976

10

.10189

.027512

.027772

.031426

.029687

3.8209

3.8718

4.6156

4.3609

11

.090742

.021820

.022026

.024924

.023549

3.4028

3.4482

4.1106

3.8838

12

.080808

.017304

.017468

.019766

.018676

3.0303

3.0707

3.6606

3.4586

13

.071961

.013722

.013851

.015674

.014809

2.6985

2.7345

3.2598

3.0799

14

.064084

.010886

.010909

.012435

.011746

2.4032

2.4352

2.9030

2.7428

15

.057068

.008631

.008712

.009859

.009315

2.1401

2.1686

2.5852

2.4425

16

.050320

.006845

.006909

.007819

.007587

1.9058

1.9312

2.3021

2.1751

17

.045257

.005407

.005478

.006199

.005857

1.6971

1.7198

2.0501

1.937

18

.040303

.004304

.004304

.004916

.004645

1.5114

1.5315

1.8257

1.725

19

.035890

.003413

.003445

.003899

.003684

1.3459

1.3638

1.6258

1.6361

20

.031961

.002708

.002734

.003094

.002920

1.1985

1.2145

1.4478

1.3679

21

.028462

.002147

.002167

.002462

.002317

1.0673

1.0816

1.2893

1.2182

22

.025347

.001703

.001719

.001945

.001838

.95051

.96319

1.1482

1.0849

23

.022571

.001350

.001363

.001542

.001457

.84641

.8677

1.0225

.96604

24

.020100

.001071

.001081

.001223

.001155

.75375

.7638

.91053

.86028

25

.017900

.0008491

.0008571

.0009699

.0009163

.67125

.6802

.81087

.76612

26

.015940

.0006734

.0006797

.0007692

.0007267

.59775

.60572

.72208

.68223

27

.014195

.0005340

.0005391

.0006099

.0005763

.63231

.53941

.64303

.60755

28

.012641

.0004235

.0004275

.0004837

.0004570

.47404

.48036

.57264

.63103

29

.011257

.0003358

.0003389

.0003835

.0003624

.42214

.42777

.50994

.48180

30

.010025

.0002663

.0002688

.0003042

.0002874

.37594

.38095

.45413

.42907

31

.008928

.0002113

.0002132

.0002413

.0002280

.3348

.33926

.40444

.38212

32

.007950

.0001675

.0001691

.0001913

.0001808

.29813

.3021

.36014

.34026

33

.007080

.0001328

.0001341

.0001517

.0001434

.2656

.26904

.32072

.30302

34

.006304

.0001053

.0001065

.0001204

.0001137

.2364

.23955

.28567

.26981

35

.005614

.00008366

.00008445

.0000956

.00009015

.21053

.21333

.25431

.24028

36

.005000

.00006625

.00006687

.0000757

.0000715

.1875

.19

.2265

.2140

37

.004453

.00005255

.00005304

.00006003

.00005671

.16699

.16921

.20172

.19059

38

.003965

.00004166

.00005205

.00004758

.00004496

.14869

.16067

.17961

.1697

39

.003531

.00003305

.00003336

.00003775

.00003566

.13241

.13418

.15995

.15113

40

.003144

.00002620

.00002644

.00002992

.00002827

.1179

.11947

.14242

.13456

Specific, Gravities..

7.774

7.847

8.880

8.386

7.200

7.296

8.698

8.218

Weights of a cub. ft.

585.87

490.45

554.988

524.16

450.

456.

543.6

513.6