The story of Pittsburgh: Radium

Bibliographic data

Multivolume work

Identifikator:: 1831622599

Document type:: Multivolume work

Title:: The story of Pittsburgh

Place of publication:: Pittsburgh

Publisher:: First National Bank

Year of publication:: 1919-1930

Collection:: Economics Books

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Volume

Identifikator:: 1831623226

URN:: urn:nbn:de:zbw-retromon-239786

Document type:: Volume

Title:: Radium

Volume count:: Vol. 1, nr. 7

Place of publication:: Pittsburgh

Publisher:: First National Bank

Year of publication:: 1921

Scope:: [ca. 18] Seiten

Digitisation:: 2022

Collection:: Economics Books

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Chapter

Document type:: Multivolume work

Structure type:: Chapter

Title:: Radium

Collection:: Economics Books

its extraction was comparatively easy, with small charges of dynamite. When as more frequently happens, the deposits are found under a heavy overload of other material, regular mining tunnels are run and dynamite charges used to break the rock and other material so that it may be carried to the surface. In size, the ore bodies vary from pockets containing a few pounds to deposits yielding as much as 1800 tons in very exceptional cases. As there are often no indications leading to a deposit of ore, prospecting is done by drilling in what seem likely spots with jack hammers and with diamond drills. When ‘here is not more than twenty-five feet of earth and other material over any ore, the jack hammer driven by com- pressed air is the cheapest method of working. To operate “hese hammers, portable gasoline compressors are used. The extremely irregular nature of the ore bodies makes it difficult to follow a definite plan of mining. To meet these conditions, use is made of the diamond drill. As these drills bring®to the surface specimens of the material through which the boring is made, the Standard Chemical Company has definite knowledge of about what ore may be found beneath any given area of the extensive claims to which it has title. This detailed and expensive study of this region has proved of great value to the Government in connection with a thought that it might have been necessary to make the radium ore lands a Government monopoly. At the Concentration Mill in the wilds of Colorado, five hundred tons of ore are reduced to a powdered form and sacked. These sacks, weighing about 70 pounds, are transported by wagon, and where possible, by motor truck, the sixty- five miles to Placerville, Colorado. There, a narrow gauge railroad takes it to the transcontinental railroad at Salida. Colorado. From Salida, it travels the two thousand three hundred miles to Canonsburg, Pa., just outside of Pittsburgh. where the Company maintains its refining plant. At the mill in Colorado, and in the operations per- taining to it, some three hundred men are kept busy.

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