 When he had penetrated to the depth of eighteen feet, he came to a mass of native copper ten feet long, three feet wide, and nearly two feet thick, and weighing over six tons. On digging around it the mass was found to rest on billets of oak supported...  Congressional Serial Set - Сторінка 1841893Повний перегляд - Докладніше про цю книгу
 | Royal Institution of Cornwall - 1848 - 556 стор.
...of native copper, ten feet long, three feet wide, and nearly two feet thick, and weighing over six tons. On digging around it the mass was found to rest...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.... | |
 | John Wells Foster, Josiah Dwight Whitney - 1850 - 258 стор.
...of native copper ten feet long, three feet wide, and nearly two feet thick, and weighing ove,r six tons. On digging around it the mass was found to rest...supported by sleepers of the same material. This wood, specimens of which we have preserved, by its long exposure to moisture, is dark-colored, and has lost... | |
 | John Wells Foster, Josiah Dwight Whitney - 1850 - 262 стор.
...three feet wide, and nearly two feet thick, and weighing over six tons. On digging around it îfte mass was found to rest on billets of oak, supported by sleepers of the same material. This wood, specimens of which we have preserved, by its long exposure to moisture, is dark-colored, and has lost... | |
 | 1854 - 414 стор.
...of native copper, ten feet long, three feet wide, and nearly two feet thick, and weighing over six tons. On digging around it the mass was found to rest...of oak supported by sleepers of the same material. The ancient miners had evidently raised it about five feet, and then abandoned the work as too laborious.... | |
 | 1854 - 414 стор.
...came to a mass of Rheiur, ten feet long, three feet wide, and nearly two feet thick, aft* in thier six tons. On digging around it the mass was found to rest on with ik supported by sleepers of the same material. The ancient rocksevidently raised it about five... | |
 | John H. Pitezel - 1857 - 448 стор.
...native copper, ten feet long, three feet wide, and nearly two feet thick, and weighing over six tuns. On digging around it the mass was found to rest on...supported by sleepers of the same material. This wood, specimens of which have been preserved, by its long exposure to moisture is dark-colored, and has lost... | |
 | sir Daniel Wilson - 1862 - 520 стор.
...ancient excavations : " This wood, by so long exposure to moisture, is dark-coloured, and has lost all its consistency. A knife -blade may be thrust into it as easily as into a peat-bog." It was in the year 1847 that attention was first directed to such traces of ancient mining operations,... | |
 | Sir Daniel Wilson - 1862 - 534 стор.
...ancient excavations : " This wood, by so long exposure to moisture, is dark-coloured, and has lost all its consistency. A knife -blade may be thrust into it as easily as into a peat-bog." It was in the year 1847 that attention was first directed to such traces of ancient mining operations,... | |
 | Charles Lanman - 1871 - 576 стор.
...mass of native copper, ten feet long, three feet wide, and nearly two feet thick, weighing over six tons. On digging around it the mass was found to rest...billets of oak, supported by sleepers of the same wood. The ancient miners had evidently raised the mass about five feet, and then abandoned it as too... | |
 | Geological and Natural History Survey of Minnesota - 1893 - 742 стор.
...mass of native copper ten feet long, three feet wide, and nearly two feet thick, and weighing over six tons. On digging around it the mass was found to rest...supported by sleepers of the same material. This wood, specimens of which we have preserved, by its long exposure to moisture, is dark-colored and has lost... | |
| |
