Number of mines, quarries, or wells.....................

151,516

Number of operators.

46,858

Salaried officials, clerks, etc:

Total number.

38,128

Total salaries

$39,020,552

General officers-

Number.

4,591

Salaries.

$8,218,541

Superintendents, managers, foremen, surveyors, etc-

Number,

15,538

Salaries.

$16,666,416

Foremen, below ground* -

Number.

6,863

Salaries

$6,208,307

Clerks-

Number,

11,136

Salaries.

$7,927,288

Wage-earners:

Aggregate average number

581,728

Aggregate wages

$369,959,960

Above ground -

Total average number

221,505

Total wages

$125,086,530

Engineers, firemen, and other mechanics -

Average number.

60,859

Wages.

$44,478,246

Miners, or quarrymen and stonecutters-

Average number.

67,129

Wages.

$33,971,290

Boys, under 16 years-

Average number.

6,219

Wages.

$1,339,478

All other wage-earners -

Average number.

87,298

Wages.

$45,297,516

Below ground -

Total average number

360,223

Total wages

$244,873,430

Wage-earners - Continued:

Miners -

Average number

257,301

Wages.

$184,674,193

Miners' helpers -

Average number

18,736

Wages.

$11,496,910

Boys, under 16 years -

Average number

5,638

Wages.

$1,548,889

All other wage-earners -

Average number

78,548

Wages.

$47,153,438

Contract work :

Amount paid.

$20,677,938

Number of employees

21,183

Miscellaneous expenses, total

$71,771,713

Royalties and rent of mine and mining plant...............

$34,530,713

Rent of offices, taxes, insurance, interest, and other sundries..................................

$37,241,000

Cost of supplies and materials

$123,814,967

Product, value.

$796,826,417

Power:

Total horsepower.

2,867,562

Owned -

Engines -

Steam, number.

64,179

Horsepower.

2,432,963

Gas, or gasoline, number..................

13,506

Horsepower.

259,695

Water wheels, number.

980

Horsepower.

60,897

Other power, number

1,162

Horsepower.

84,546

Rented -

Electric, horsepower.

23,556

Other kind, horsepower.

5,905

Electric motors owned, number...................

2,893

Horsepower.

130,494

Supplied to other establishments, horsepower.................

2,852

* Foremen here reported should be added to the number of wage-earners below ground in order to ascertain the actual number employed below ground. - Census Bulletin.