 | Perry Fairfax Nursey - Industrial arts - 1846 - 650 pages
...with it all the drilled particles.' On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | Chemistry - 1846 - 586 pages
...with it all the drilled particles." On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | Meteorology - 1846 - 910 pages
...with it all the drilled particles. On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | Geology - 1847 - 486 pages
...v/ith it all the drilled particles.' On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | 1846 - 648 pages
...with it all the drilled particles.' On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | British Association for the Advancement of Science - Science - 1847 - 606 pages
...with it all the drilled particles.' On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | British Association for the Advancement of Science - Science - 1847 - 662 pages
...with it all the drilled particles.' On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod, formed of wrought iron tubeâ screwed end to end : the lower end of the hollow rod is armed with a perforating tool, suited... | |
 | John Budge - Mine surveying - 1858 - 224 pages
...paper written by M. Arago, and read by Mr. Vignoles, at the meeting of the British Association in 1846. The apparatus is composed of a hollow boring rod,...hollow rod is connected with a force pump by jointed or THE PRACTICAL MINSK'S GUIDE. flexible tubes, which will follow the descending movement of the boring... | |
 | British Association for the Advancement of Science. Meeting - Science - 1847 - 718 pages
...with it all the drilled particles.' On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
 | Electronic journals - 1846 - 464 pages
...with it all the drilled particles. On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod,...perforating tool, suited to the character of the strata which have to be encountered. The diameter of the tool is larger than the diameter of the tubular rod,... | |
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... with me — This is a remarkable fact and one very easy to imitate ; if, through a hollow boring rod, water be sent down into the bore-hole as it is sunk, the water, in coming up again, must bring with it all the drilled particles. On this principle... 