Mineral Resources of the United States, Part 2

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U.S. Government Printing Office, 1912 - Mineral industries
 

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Page 850 - These subjects are therefore treated here only in briefest outline, and the reader is referred to the bibliography at the end of this chapter for more complete data.
Page 237 - States as shown by the report of the Bureau of Statistics of the Department of Commerce and Labor...
Page 29 - No. 185, which may be obtained on application to the Director of the United States Geological Survey, Washington, DC...
Page 500 - Significance. — The object of this test is to determine the time which elapses from the moment water is added until the paste ceases to be fluid and plastic (called the "initial set"), and also the time required for it to acquire a certain degree of hardness (called the "final
Page 494 - IN CANADA. According to the preliminary report on the mineral production of Canada during the calendar year 1911...
Page 497 - The specific gravity of cement shall not be less than 3.10. Should the test of cement as received fall below this requirement, a second test may be made upon a sample ignited at a low red heat. The loss in weight of the ignited cement shall not exceed 4 per cent.
Page 143 - The statistics of production during the last five years, with the distribution of the product for consumption, are shown in the following table: Distribution of the coal product of Maryland, 1907-1911, in short tons.
Page 194 - County. Loaded at mines for shipment. Sold to local trade and used by employees. Used at mines for steam and heat. Made into coke. Total quantity. Total value. Averago price per ton. Average number of days active. Average number of employees. King Kittitas Lewis Pierce 1 070,948 1,802,76...
Page 28 - COAL FIELDS OF THE UNITED STATES. The coal areas of the United States are divided, for the sake of convenience, into two great divisions — anthracite and bituminous. The areas in which anthracite is produced are confined almost exclusively to the eastern part of Pennsylvania, and usually when the anthracite fields of the United States are referred to those of eastern Pennsylvania are meant. These fields are included in the counties of Susquehanna, Lackawanna, Luzerne, Carbon, Schuylkill, Columbia,...
Page 25 - Virginia, about seventy years after Father Hennepin's discovery in Illinois, but the first records of production from the Virginia mines were for the year 1822, when, according to one authority, 54,000 tons were mined. Ohio probably ranks second in priority of production, as coal was discovered there in 1755, but the records of production date back only to 1838. The mining of anthracite in Pennsylvania began about 1790, and it is said that in 1807 55 tons were shipped to Columbia, Pa. Reports of...

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