 | Michigan. Geological and Biological Survey - 1911 - 1062 páginas
...drift was carried into the vein when, after having proceeded seventy feet they struck a large mass—"a fortunate circumstance, not only to the company, but...water to account 'satisfactorily for its position." (Foster & Whitney.) To this mine the Copper Country owes much. It acted, we might say, as the fly wheel... | |
 | Alfred Church Lane - 1911 - 530 páginas
...drift was carried into the vein when, after having proceeded seventy feet they struck a large mass — "a fortunate circumstance, not only to the company,...at least one geologist as to the transport of the Outonagon mass from Isle Royale, and showed that it was not necessary to resort to icebergs and changes... | |
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... fortunate circumstance, not only to the company, but to the whole mining interest on Lake Superior. It gave encouragement to those engaged in these pursuits, and induced them to persevere. It also demonstrated the true source from which the loose... 