 | 1855 - 490 Seiten
...the zinc ores, viz., zinc blende and calamine, prevail in greater or less proportions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale." "The gneissic strata of the tract embracing this group of lead-bearing veins, seem lo differ in no... | |
 | 1855 - 990 Seiten
...the zinc ores, viz., zinc blende and calamine, prevail in greater or less proportions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale." " The gneissic strata of the tract embracing this group of lead-bearing veins, seem to differ in no... | |
 | American Association for the Advancement of Science - 1856 - 384 Seiten
...But the zinc ores, namely, zinc blende and calamine, prevail in greater or less portions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential... | |
 | 1853 - 690 Seiten
...in both sets of veins, existing, perhaps, in a rather larget relative amount in the copper bearing lodes of the red shale. Thus, the Perkiomen and Ecton...Kennedy, and the Morris lode, near Phoenixville, are all genuine copper veins, and they are all, without exception, in the red shale formation. On the other... | |
 | 1853 - 688 Seiten
...But the zinc or» viz., zinc blende and calamine, prevail in greater or less propr tions in both sets of veins, existing, perhaps, in a rather larger relative amount in the copper bearing loties of the red shale. Thus, the Perkiomen and Ecton lode ; the United mine lode ;... | |
 | Josiah Dwight Whitney - 1854 - 530 Seiten
...those which are included solely within the red shale are characterized by containing ores of copper. The Perkiomen and Ecton Lode, the United Mine Lode, the Shannonville South Lode, and a few others, are mentioned as true copper lodes, and all in the red shale. The phenomena of the... | |
 | 1855 - 484 Seiten
...the V.'IMC ores, viz., zinc blende and calamine, prevail in greater or less proportions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale." " The gneissic strata of the tract embracing tliis group of lead-bearing veins, seem to differ in no... | |
 | 1856 - 384 Seiten
...But the zinc ores, namely, zinc blende and calamine, prevail in greater or less portions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential... | |
 | American Association for the Advancement of Science - 1856 - 964 Seiten
...But the zinc ores, namely, zinc blende and calamine, prevail in greater or less portions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential... | |
 | American Association for the Advancement of Science - 1856 - 414 Seiten
...But the zinc ores, namely, zinc blende and calamine, prevail in greater or less portions in both sets of veins, existing, perhaps, in a rather larger relative...amount in the copper-bearing lodes of the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential... | |
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It would seem to be a pretty general fact, that such of these veins as are confined entirely or chiefly to the gneiss bear lead as their principal metal, whereas those which are included solely within the red shale are characterized by containing the... 
