 CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because of the danger of contamination by particles of metal and the impossibility of cleansing the roughened surfaces after they have been in use a short...  Bulletin of the United States Geological Survey - Seite 22von Geological Survey (U.S.) - 1896Vollansicht - Über dieses Buch
 | 1901 - 392 Seiten
...much in use in technical laboratories, where they answer their purpose more or less satisfactorily, and something similar is needed in those scientific...steel crushers and mortars is out of the question, becauie of the danger of contamination by particles of metal, and the impossibility of cleansing the... | |
 | Marcus Baker - 1900 - 350 Seiten
...satisfactorily, and something similar is needed in those scientific laboratories where rock anal}Tsis is of daily occurrence and many samples must be reduced...after they have been in use a short time. Extraction by the aid of a magnet of steel particles thus introduced into the powder is quite inadmissible, since... | |
 | 1907 - 874 Seiten
...the true average composition of the rock. it. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because...after they have been in use a short time. Extraction, by the aid of a magnet, of steel particles thus introduced into the powder is quite inadmissible, since... | |
 | Henry Gannett - 1906 - 644 Seiten
...the true average composition of the rock. B. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because...after they have been in use a short time. Extraction, by the aid of a magnet, of steel particles thus introduced into the powder is quite inadmissible, since... | |
 | William Francis Hillebrand - 1907 - 212 Seiten
...the true average composition of the rock. B. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because...after they have been, in use a short time. Extraction, by the aid of a magnet, of steel particles thus introduced into the powder is quite inadmissible, since... | |
 | William Francis Hillebrand - 1910 - 252 Seiten
...work, however careful, may count for little. B. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because...after they have been in use a short time. Extraction, by the aid of a magnet, of steel particles thus introduced into the powder is quite inadmissible, since... | |
 | Samuel Stinson Gannett, David Henry Baldwin - 1910 - 490 Seiten
...work, however careful, may count for little. B. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because of the danger of contamination by partides of metal and the impossibility of cleansing the roughened surfaces after they have been in... | |
 | C. Remigius Fresenius - 1915 - 1290 Seiten
...much in use in technical laboratories, where they answer their purpose more or less satisfactorily, and something similar is needed in those scientific...after they have been in use a short time. Extraction by the aid of a magnet of steel particles thus introduced into the powder is quite inadmissible, since... | |
 | John Milton Nickles - 1919 - 586 Seiten
...work, however careful, may count for little. B. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because...after they have been in use a short time. Extraction, by the aid of a magnet, of steel particles thus introduced into the powder is quite inadmissible, for... | |
 | 1919 - 304 Seiten
...work, however careful, may count for little. B. CRUSHING. For accurate analyses the use of steel power crushers and mortars is out of the question because...after they have been in use a short time. Extraction, by the aid of a magnet, of steel particles thus introduced into the powder is quite inadmissible, for... | |
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