Bulletin . S » a a -« « w to 1)5 C > (M <! © 2 incto H^d xNaxNOO 91. & d £ 5 CS . *- 3 Jfi P a -a 2 © V > •8 o oS •^fl .©» »• ® d 55 tT o 3 a d • « a £ 33^3 so 3 ® to « N w dS H S c3 =>m H o 1-° a CM «jff iacsj .a iNao aaa xxaxtfoo QUARRYING AND QUARRYING METHODS. 93 and although a series large enough to make the data as comprehensiveas in the foregoing investigation was not obtained, nevertheless thestriking similarity of the results obtained and the fact that this seriescontains a three-hour sample, which is lacking in the other series,makes the presentation of the data advisable
Bulletin . S » a a -« « w to 1)5 C > (M <! © 2 incto H^d xNaxNOO 91. & d £ 5 CS . *- 3 Jfi P a -a 2 © V > •8 o oS •^fl .©» »• ® d 55 tT o 3 a d • « a £ 33^3 so 3 ® to « N w dS H S c3 =>m H o 1-° a CM «jff iacsj .a iNao aaa xxaxtfoo QUARRYING AND QUARRYING METHODS. 93 and although a series large enough to make the data as comprehensiveas in the foregoing investigation was not obtained, nevertheless thestriking similarity of the results obtained and the fact that this seriescontains a three-hour sample, which is lacking in the other series,makes the presentation of the data advisable. The results are shownin figure 22. DISCUSSION OF RESULTS. The size of ball mill and operating conditions employed in theproduction of these samples varied considerably from that of thefirst series, but the ratio between the proportions of the different sizedgrains did not vary more than might be expected in a duplication oftest on one mill. The resu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
