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CHRONOLOGICAL LIST OF PRINCIPAL COAL MINE DISASTERS IN NORTH AMERICA.

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PRICE OF COAL.

[Sources: Anthracite, for shipment beyond the Delaware Capes, American Iron and Steel Associa tion; bituminous, Saward's Coal Trade Journal.]

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1 The price on board fixed at Baltimore by the Seaboard Coal Association. Price of soft-coal pool.

Owing to unusual conditions in the coal market the association price for 1902 is not a correct guide as to the actual selling price, Clearfield coal selling as high as $7 at the mines and as high as 89 in New York Harbor. Unsettled conditions lasted until Mar. 1, 1903, or nearly so; then, on Apr. 1, prices were made $3.30 at Baltimore; later on in the year this price was discounted from 10 to 15 per cent. Shipments nominal. No sales made in 1909, 1910, of 1911.

Cumberland coal now includes "thin seam" as well as "big vein" coal, the former selling about 25 cents per ton lower than the latter.

Freight on "big vein" coal to Baltimore having been reduced 15 cents, $2.60 in 1909 and subsequent years is equivalent to $2.75 in 1908 and previous years.

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COKE.

The production of coke in 1910 amounted to 41,708,810 short tons (7,138,734 tons from retort ovens), valued at $99,742,701, and the average price paid per ton for the same period was $2.39. The average output from the byproduct ovens in 1910 was 1,762 short tons per oven. The average output from beehive ovens in 1910 was 376 tons per oven. The imports of coke were valued at $625,130 in 1910, and the exports at $3,053,293.

The value and quantity of products obtained in the manufacture of coke in retort ovens were as follows: gas, 27,692,858 thousand cubic feet, valued at $3,017,908; tar, 66,303,214 gallons, valued at $1,599,453; ammonia sulphate or reduced to equivalent in sulphate, 70;247,543 pounds, valued at $1,841,062; ammonia liquor, 4,654,282 gallons, valued at $295,868; anhydrous ammonia 20,229,421 pounds, valued at $1,725,266; thus making the total value of the byproducts of coke $8,479,557. The value of the coke manufactured in retort ovens was $24,793,016 and the total value of all the products obtained in the manufacture of coke was $33,272,573.

NATURAL GAS.

The value of natural gas produced in 1910 was $70,756,158, as compared with $63,206,941 in 1909. No imports of natural gas in 1910 were reported. Pennsylvania consumed more natural gas than any other state in the Union, the amount being 168,875,559 thousand cubic feet, valued at $23,934,691; Ohio ranked second with 108,074,660 thousand cubic feet, valued at $21,210,965; Kansas came next with 81,929,740 thousand cubic feet, with a value of $9,163,863; and West Virginia fourth with 77,067,756 thousand cubic feet, valued at $5,617,910. During the year 1910 there were 509,155,309 thousand cubic feet of natural gas consumed, having a total value of $70,756,158. The value of all the natural gas produced in the United States for the year 1910 was $70,756,158 and of the crude petroleum, $127,896,328; thus making the total value of natural gas and crude petroleum produced in the United States $198,652,486.

PRODUCTION AND VALUE OF PETRO-
WELL RECORDS, AND
LEUM,

ACREAGE FOR THE UNITED
STATES IN 1910.

In the year 1910 the total production of petroleum in the United States amounted to 198,026,646 barrels; 173,545,058 of which were placed to the credit of the producer, and 24,481,588 to the land-owner. The total value of this petroleum was $118,955,429, and the average price per barrel was $0.601. On January 1, 1910, the stock at the wells amounted to 9,014,441 barrels, and on December 31, to 11,778,827 barrels. On January 1, 1910, there were 147,118 productive wells in the United States; and on December 31, there were 148,440. At this time there were 1.129 wells drilling. The average production per well per day amounted to 3.7 barrels. The total acreage in wells in the United States in 1910 amounted to 9,280,568,

PETROLEUM REFINING.

The products of the petroleum-refining industry, statistics for which are presented below, aggregated $236,997,659 in value in 1909 as compared with $123,929,384 in 1899, the increase during the decade being 91.2 per cent. This conforms closely with the increase in the cost of crude petroleum used which was 89.4 per cent. The crude petroleum used increased in quantity from 52,011,005 barrels of 42 gallons in 1899 to 120,775,439 barrels in 1909, or 132.2 per cent., and the refined-oil products aggregated 40,290,985 barrels of 50 gallons in 1899 and 89,082,810 barrels in 1909, an increase of 136.2 per cent. for the decade. The total amount of crude petroleum used for refining purposes was 120,775,439 barrels of 42 gallons each, valued at $152,307,040. The products of the refining process were as follows: Illuminating oils, 33,495,798 barrels (50 gallons), value, $94,547,010; fuel oils (including gas oils), 34,034,577 barrels, value $36,462,883; lubricating oils, 10,745,885 barrels, valued at $38,884,236; naphtha and gasoline (including gas naphtha), 10,806,550 barrels, value $39,771,959; paraffin wax, 946,830 barrels, value $9,388,812; oil asphaltum, 233,328 short tons, value $2,724,752; residuum or tar, 1,787,008 barrels, value $2,215,623; greases (lubricating, etc.), 138,302 barrels, value $1,567,647; coke and black naphtha, value $507,695; sludge acid, 133,215 short tons, value $402.295; and all other products, value $10,524,747.

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WORLD'S PRODUCTION OF CRUDE PETROLEUM, 1906–1910, BY COUNTRIES.

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QUANTITY OF PETROLEUM PRODUCED

IN,

AND QUANTITIES AND VALUE OF PETROLEUM PRODUCTS EXPORTED FROM, THE UNITED STATES.

The total exports of petroleum from the United States during the year 1910 amounted to 1,502,491,933 gallons, and were valued at $94,107,022. The exports of mineral, crude (including all natural oils, without regard to gravity) oils, was 180,111,166 gallons, valued at $5,404,253; the exports of mineral, refined, or manufactured naphtha, benzine, gasoline, etc., totaling 100,695,382 gallons, was valued at $8,407,102; the exports of mineral, refined, or manufactured illuminating oils 940,247,039 gallons, valued at $55,642,268; the export of mineral, refined, or manufactured lubricating (heavy paraffine, etc.), oils amounting to 163,832,544 gallons, was valued at $20,921,103; and the export of residuum (tar. pitch, and all other, from which the light bodies have been distilled). valued at $3,732,196, amounted to 117,605,802 gallons.

CEMENT.

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The total quantity of Portland, natural, and puzzolano cement produced in the United States during 1910 was 77,785,141 barrels, valued at $68,752,092. As compared with 1909, when the production was 66,689,715 barrels, valued at $53,610,563, the year 1910 showed an increase of 11,095.426 barrels, or 16.6 per cent. in quantity, and an increase of $15.141,529, or 28.2 per cent. in value. In 1910 the quantity of Portland cement pro

duced

was 76,549,951 barrels, valued at $68,205,800; the production of natural cement amounted to 1,139,239 barrels, valued at $483,006; and the production of puzzolano cement was 95,951 barrels, valued at $63,286.

From 1818 when the first natural cement was used, 300,000 barrels, up to the year 1899, when the maximum amount, 9,868,179 barrels, was used, the consumption of natural cement constantly grew. Since 1899, however, the consumption has gradually decreased, until in 1910 the production only amounted to 1,139,239 barrels. The future of natural cement depends entirely upon means of improvement in the manufacture of the cement, whereby it may be brought nearer to the specifications for high-grade Portland cement. The decline in the use of natural cement has been due principally to the greater tensile strength of Portland cement.

During the year 1910 the domestic production of cement amounted to 76,549,951 barrels, and the imports to 306,863 barrels. The total available supply of Portland cement for this period amounted to 76,006,348 barrels. The exports of Portland cement during the year amounted to 2,475,957 barrels; thus making the apparent consumption 74,380,857 barrels.

The total production of pig-iron for the year 1911 was 23,649,547 tons against 27,303,567 tons in 1910. On June 30, 1911, there were 212 furnaces in blast and on December 31 there were 231. The total number of furnaces on December 31, 1911, was 466,

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PART OF THE 74,000,000 BARRELS OF CEMENT MANUFACTURED IN 1910 AND WHERE IT WENT.
To Panama Canal in 1910: 2,100,000 barrels of cement, which would fill 9 trains each 10 miles in length and consisting of 1,400 cars.
To Florida-Key West Railroad: 800,000 barrels of cement. Three trains each over 10 miles long.
To Ashokan Dam: 1,000,000 barrels. Four trains over 10 miles long.

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