Product.

1902.

Quantity.

Value.

Metallic.

Pig iron (spot value)

..long tons....

17,821,307

$372,775,000

Silver, coining value.

. fine ounces.. .

55,500,000

71,757,575

Gold, coining value.

do.

3,870,000

80,000,000

Copper, value at New York City

........lbs.. .

659,508,644

76,568,954

Lead, value at New York City.

. short tons.. .

270,000

22,140,000

Zinc, value at New York City

do.

156,927

14,625,596

Quicksilver, value at San Francisco.

....flasks.......

1 34,291

1,467,848

Aluminum, value at Pittsburg

........lbs.. .

7,300,000

2,284,590

Antimony, value at San Francisco.

. short tons.. .

3,561

634,506

Nickel, value at Philadelphia.

........lbs;. .

5,748

2,701

Tin.

........do.. .

None.

Platinum, value (crude) at San Francisco.

troy ounces.. .

94

1,814

Total value of metallic products.

$642,258,584

Non-Metallic (spot values).

Bituminous coal

. short tons.. .

260,216,844

$290,858,483

Pennsylvania anthracite.

..long tons....

36,940,710

76,173,586

Natural gas.

30,867,668

Petroleum.

.......bbls.. .

2 88,766,916

71,178,910

Brick clay.

15,000,000

Cement.

.......bbls...

25,753,504

25,366,380

Stone.

64,559,099

Corundum and emery.

. short tons.. .

4,251

104,605

Crystalline quartz.

do.

15,104

3 84,335

Garnet for abrasive purposes.

do.

3,926

132,820

Grindstones.

667,431

Infusorial earth and tripoli.

. short tons.. .

5,665

53,244

Millstones

59,808

Oilstones, etc.

3 221,762

Arsenious oxide.

. short tons.. .

1,353

81,180

Borax (refined)

do.

4 17,404

2,447,614

Borax (crude)

do.

2,600

91,000

Bromine.

........lbs.. .

513,890

128,472

Fluorspar

. short tons.. .

5 48,018

271,832

Gypsum

do.

816,478

2,089,341

Lithium

do.

1,245

25,750

Marls

do.

12,439

12,741

1 In addition the census reports 11,727 short tons of cinnabar, valued at $82,242, as mined but not marketed in 1902.

2 In addition the census reports 508,386 barrels of petroleum, valued at $218,829, as produced but not marketed in 1902.

3 Value of crude production as reported by the census: Crystalline quartz, $43,085; oilstones, $113,968.

4 Production in 1902, as reported by the census, 19,142 short tons, valued at $2,383,614.

5 In addition the census reports 800 short tons of fluorspar, valued at $3,850, as mined but not marketed in 1902.

Product.

1902.

Quantity.

Value.

Phosphate rock.........................

..long tons.....

6 1,490,314

$4,693,444

Pyrite.........................

. . do.

297,874

947,089

Salt.................................

.......bbls.. .

23,849,221

5,668,636

Sulphur..........................

. . short tons.. .

(7)

(7)

Barytes (crude).........................

do.

61,668

203,154

Cobalt oxide....................

........lbs...

3,730

6,714

Mineral paints......................

. . short tons.

8 73,049

944,332

Zinc white.........................

do.

52,645

4,016,499

Asbestos................................

do.

9 1,005

16,200

Asphaltum........................

do.

10 105,458

765,048

Bauxite........................

. . long tons.. .

29,222

128,206

Chromic iron ore.........................

do..

315

4,567

Clay (all other than brick)...................

. . short tons.. .

1,455,357

2,061,072

Feldspar................................

do.

45,287

250,424

Fibrous talc.................................

do.

71,100

615,350

Flint.........................................

do.

36,365

144,209

Fuller's earth...........................

do.

11,492

98,144

Glass sand..................................

do.

943,135

807,797

Graphite (crystalline)..................

........lbs.. .

11 3,936,824

182,108

Graphite (amorphous)..........................

. . short tons.. .

4,739

Limestone for iron flux.........................

. . long tons.. .

11,878,675

5,271,252

Magnesite..........................................

. .short tons.. .

12 3,466

21,362

Manganese ore....................................

. . long tons.. .

16,477

177,911

Mica (sheet).................................

........lbs...

373,266

83,843

Mica (scrap)..................................

. . short tons.. .

1,400

35,006

Mineral waters...................................

gallons sold.. .

64,859,451

8,793,761

Monazite................................

........lbs.. .

802,000

64,160

Ozocerite (refined)..........................

....do......

None.

Precious stones...........................

328,450

Pumice stone....................................

. . short tons.. .

700

2,750

Rutile..................................

........lbs...

(12)

Soapstone..........................

. short tons.. .

26,854

525,157

Uranium and vanadium......................

do.

3,810

48,125

Total value of non-metallic mineral products................

$617,380,831

Total value of metallic products....................................

642,258,584

Estimated value of mineral products unspecified...........

1,000,000

Grand total..............................................................

1,260,639,415

6 The total quantity of phosphate rock mined in 1902 was 1,548,720 long tons, valued at $4,922,943.

7 Included under pyrite.

8 Production of crude material of mineral paints was 35,479 short tons, valued at $360,885.

9 In addition, 1500 short tons of crude asbestos, valued at $30,000, are reported by the census as mined but not marketed in 1902.

10 The production of the crude material is reported by the census as 66,238 short tons, valued at $236,728.

11 In addition, graphite to the value of $45,400 is reported as mined but not marketed in 1902.

12 The magnesite actually mined in 1902 is reported as 3,086 short tons, valued at $19,639.

13 Included under estimated unspecified products.

Speeds for Grinding and Polishing, etc.

Speed of

Ft. per Min.

Large grindstones for polishing.

. . 2,000

Emery disks..............2,500 to 3,000

Polishing large articles...............

750

Tool grinders...............................

650

Circular saws for hot iron..................

. . . 20,000

Disintegrators.........................

. . . 10,000

Plate-bending rolls.........................

4

Millstones..............................

. .. 17 000

Sack tackle.........................

50

Depreciation of Machinery, etc., per Annum on First Cost.

Machinery, etc.

Depreciation.

Wear and

Tear.

Total.

Engines...................

3%

3 %

6 %

Boilers.............

7%

3 %

10 %

Machines............

5%

3 %

8 %

Millwork and gearing..

3%

2 1/3%

5 1/4%

Bands and belts...........

45 %

45 %