 | Royal Institution of Cornwall - 1848 - 556 σελίδες
...around it the mass was found to rest on billets of oak supported by sleepers of the same material. The ancient miners had evidently raised it about five feet, and then abandoned the work ai too laborious. They had taken off every projecting point which was accessible, so that the exposed... | |
 | 1853 - 676 σελίδες
...supported by sleepers of the same material. This wood was dark coloured, and had lost its consistency. The ancient miners had evidently raised it about five feet, and then abandoned the work ae too laborious. Below this, the vein was filled with a sheet of pure copper, five feet thick, and... | |
 | 1854 - 414 σελίδες
...around it the mass was found to rest on billets of oak supported by sleepers of the same material. The ancient miners had evidently raised it about five...taken off every projecting point which was accessible, BO that the exposed surface was smooth."— (.Foster and Whitney's Report on the Copper-Landi of Lake... | |
 | John H. Pitezel - 1857 - 448 σελίδες
...specimens of which have been preserved, by its long exposure to moisture is dark-colored, and has lost all its consistency. A knife-blade may be thrust into...accessible, so that the exposed surface was smooth." (Part I, page 159.) Proof of the high antiquity of these works is found in the fact that trees growing... | |
 | Geological and Natural History Survey of Minnesota - 1893 - 742 σελίδες
...specimens of which we have preserved, by its long exposure to moisture, is dark-colored and has lost all its consistency. A knife-blade may be thrust into...about five feet and then abandoned the work as too laborous. They had taken off every projecting point which was accessible, so that the exposed surface... | |
 | John Wells Foster - 1874 - 432 σελίδες
...to a knife-blade than so much peat. The earth was so firmly packed as to support the mass of copper. The ancient miners had evidently raised it about five...feet and then abandoned the work as too laborious, having first knocked off all the projecting points. The vein was wrought in the form of an open trench,... | |
 | Alfred P. Swineford - 1876 - 340 σελίδες
...to a knife blade than so much peat. The earth was so firmly packed as to support the mass of copper. The ancient miners had evidently raised it about five...feet and then abandoned the work as too laborious. The number of ancient hammers he took from this and other excavations, exceeded ten cart loads. They... | |
 | 1886 - 740 σελίδες
...to a knife blade than so much peat. The earth was so firmly packed as to support the mass of copper. The ancient miners had evidently raised it about five...feet and then abandoned the work as too laborious. The number of ancient (stone) hammers he took from this and other excavations exceeded ten cart loads.... | |
 | Horace Hollister - 1885 - 572 σελίδες
...consistency. A knife blade may be thrust into it as easily as into a peat-bog. The earth was so packed about the copper as to give it a firm support. The ancient...feet, and then abandoned the work as too laborious. Every projecting point was taken off, and the exposed surface rendered perfectly smooth. Trees are... | |
 | Michigan State Horticultural Society - 1887 - 616 σελίδες
...to a knife blade than so much peat. The earth was so firmly packed as to support the mass of copper. The ancient miners had evidently raised it about five...feet, and then abandoned the work, as too laborious. The number of ancient (stone) hammers which he took from this and other excavations, exceeded ten cart... | |
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The earth was so packed around the copper as to give it a firm support. The ancient miners had evidently raised it about five feet and then abandoned the work as too laborous. They had taken off every projecting point which was accessible, so that the... 
