 | Perry Fairfax Nursey - 1846 - 650 σελίδες
...excavated material may rise up. The upper end of the hollow rod is connected with a forcepump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotary movement with a turning handle, or by percussion... | |
 | 1846 - 910 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotary movement with a turning handle or by percussion with... | |
 | 1846 - 586 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump, by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent nf some yards. This boring tube may be either worked by a rotatory movement with a turning handle,... | |
 | 1847 - 486 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotary movement with a turning handle, or by percussion... | |
 | British Association for the Advancement of Science - 1847 - 606 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump hy jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotatory movement with a turning handle, or by percussion... | |
 | British Association for the Advancement of Science - 1847 - 662 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotatory movement with a turning handle, or by percussion... | |
 | 1846 - 648 σελίδες
...excavated material may rise up. The upper end of the hollow rod is connected with a forcepump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotary movement with a turning handle, or by percussion... | |
 | 1856 - 540 σελίδες
...The upper end of the hollow rod is connected with a force pump by jointed or flexible tubes, wliicli will follow the descending movement of the boring...boring-rod are of the common kind ; a column of water is sjut down by the pump to the bottom of the bore hole, the water rising in the annular space between... | |
 | British Association for the Advancement of Science. Meeting - 1847 - 718 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring tube may be either worked by a rotatory movement with a turning handle, or by percussion... | |
 | 1847 - 1194 σελίδες
...material may rise up. The upper end of the hollow rod is connected with a force-pump by jointed or flexible tubes, which will follow the descending movement of the boring tube for an extent of some yards. This boring lube may be either worked by a rotary movement with a turning handle, or by percussion... | |
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... the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod, in order to form around it an annular space through which the water and the excavated material may rise up. The upper end of the hollow... 