 In a dry soil, or on a rock, the trench to receive the conductor should be at least twice as long as that for a common soil, and even longer, if thereby it be possible to reach moist ground. Should the situation not admit of the trench being much increased...  Annals of Philosophy - 432 페이지1824전체보기 - 도서 정보
 | 1824 - 514 페이지
...conductor itself be similarly surrounded by it, by means of a wooden case filled with the ashes. , . jt. In a dry soil, or on a rock, the trench to receive...moist ground. Should the situation not admit of the treijch being much increased in length, others, in a transverse direction, must be made as seen at... | |
 | 1825 - 418 페이지
...then to be filled up with bakers* ashes, rammed down as hard as possible, all round the conductor. In a dry soil, or on a rock, the trench to receive...increased in length, others, in a transverse direction, should be made, in which small bars of iron, surrounded by ashes are placed, and connected with the... | |
 | 1825 - 630 페이지
...the conductor itself be similarly surrounded by it by means of a wooden case filled with the coals. In a dry soil, or on a rock, the trench to receive...length, others, in a transverse direction, must be made, in which small bars of iron surrounded by coals are placed, and connected with the conductor. In all... | |
 | Perry Fairfax Nursey - 1829 - 482 페이지
...is then to be filled up with bakers' ashes, rammed down as hard as possible all round the conductor. In a dry soil, or on a rock, the trench to receive...increased in length, others, in a transverse direction, should be made, in which small bars of iron, surrounded by ashes, are placed, and connected with the... | |
 | Thomas Curtis - 1829 - 834 페이지
...then to he filled up with bakers' ashes, rammed down as hard as possible, all round the conductor. In a dry soil, or on a rock, the trench to receive...increased in length, others, in a transverse direction, should be made, in which small bars of iron, surrounded by ashes, are placed and connected with the... | |
 | Lucius Lyon - 1853 - 218 페이지
...after turning over the cornice of the building without touching it, should be brought down the wall. In a dry soil, or on a rock, the trench to receive...increased in length, others in a transverse direction should be made, in which the lower extremities of the conductor are to be placed. In general, the trench... | |
 | Joseph Louis Gay-Lussac - 1881 - 132 페이지
...conductor. But if expense be no object, it is better to sink a much wider hole, E' K*, at least sixteen feet deep (unless water be met with at a less depth),...conductor should be at least twice as long as that in a wet soil, and even longer, if thereby it be possible to reach moist ground. Should the situation... | |
 | Richard Anderson (F.C.S.) - 1885 - 498 페이지
...The conductor itself should be surrounded in a similar way by ashes packed firmly into a wooden case. In a dry soil, or on a rock, the trench to receive the conductor should be at least twice as long as it would need to be in a wet soil, and even longer, if that be required to reach moist ground. Should... | |
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