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Books Bücher 1 - 7 von 7 in Besides these large masses these mines also carry considerable disseminated free...
" Besides these large masses these mines also carry considerable disseminated free copper. Second, the amygdaloid mines, which are characterized by the occurrence of the free copper in amygdules, bunches, strings, and sheets from the size of a pin-point... "
Bulletin - United States National Museum - Seite 82
von United States National Museum - 1892
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PROCEEDINGS

U.S. Department of Interior - 1885
...represented by three prominent mines showing three different and characteristic occurrences of th° ore. First, the so-called Mass mines, which are characterized...copper, amounting in some cases to many tons of metal in ¡i single mass, are represented by the Central mine. Besides these large masses these mines also carry...
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Annual Report of the State Mineralogist for the Year Ending ..., Band 5

California State Mining Bureau - 1885
...prominent mines showing three different and characteristic occurrences of the ore. First, the so called Mass mines, which are characterized by the occurrence...some cases to many tons of metal in a single mass, are represented by the Central Mine. Besides these large masses these mines also carry considerable...
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Report of the United States National Museum ...

United States National Museum - 1884
...making some systematic collections there. The copper occurs at Lake Superior in three distinct forms : First, the so-called mass mines, which are characterized...copper, amounting in some cases to many tons of metal iu a single mass. Besides these large masses these minee also carry considerable disseminated free...
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Report of the United States National Museum ...

United States National Museum - 1889
...prominent mines, showing three different and characteristic occurrences of the ore. In the first place, the so-called mass mines, which are characterized...some cases to many tons of metal in a single mass, were represented by the Central Mine. Mines of this kind also carry considerable quantities of disseminated...
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1889
...prominent mines, showing three different and characteristic occurrences of the ore. In the first place, the so-called mass mines, which are characterized...free copper, amounting in some cases to many tons of metul in a single mass, were represented by the Central Mine. Mines of this kind also carry considerable...
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The Published Writings of George Newbold Lawrence, 1844-1891

Lyman Spalding Foster - 1892 - 124 Seiten
...is almost the only source of copper. The native copper occurs here in three distinct forms : First, masses of free copper, amounting in some cases to many tons of metal in a single mass, the largest ever found being in the foot wall of the Minnesota Mine and weighing over four hundred...
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Annual Report of the Board of Regents of the Smithsonian Institution: 1884

Smithsonian Institution. Board of Regents - 1885
...represented by three prominent mines showing three different and characteristic occurrences of the ore. First, the so-called mass mines, which are characterized...some cases to many tons of metal in a single mass, are represented by the Central mine. Besides these large masses these mines also carry considerable...
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