 | 1825 - عدد الصفحات: 630
...instance has yet occurred of an iron bar, of rather more than half an inch square, or of a cylmder of the same diameter, having been fused, or even heated red hot by lightning. A rod of this size would therefore be sufficient for a paratonnerre, but as its stem must rise from 15... | |
 | 1832 - عدد الصفحات: 344
...half an inch square, or of a cylinder of the same diameter, having been fused, or even heated red-hot by lightning. A bar of this size would therefore be...lower part were made much thicker. An iron bar about three quarters of an inch square, is sufficient for conductors. It might even be made still smaller,... | |
 | 1833 - عدد الصفحات: 336
...half an inch square, or of a cylinder of the same diameter, having been fused, or sven heated red-hot by lightning. A bar of this size would therefore be...lower part were made much thicker. An iron bar about three quarters of an inch square, is sufficient for conductors. It might even be made still smaller,... | |
 | 1833 - عدد الصفحات: 370
...half an inch square, or of a cylinder of the same diameter, having been fused, or even heated red-hot by lightning. A bar of this size would therefore be...lightning-rod ; but as its stem ought to rise from 16 to 20 feet above the building, it would not be strong enough to resist the action of the wind, unless... | |
 | John Farrar - 1842 - عدد الصفحات: 380
...half an inch square, or of a cylinder of the same diameter, having been fused, or even heated red-hot by lightning. A bar of this size would therefore be...lightning-rod ; but, as its stem ought to rise from 15 to »() feet above the building, it would not be strong enough to resist the action of the wind, unless... | |
 | Joseph Louis Gay-Lussac - 1881 - عدد الصفحات: 132
...on fire. No example has yet occurred of an iron bar of rather more than half an inch square section, or of a cylinder of the same diameter, having been fused, or even heated red hot, by lightning. A rod of this size would therefore be sufficient for a conductor, but as its terminal rod must rise from... | |
 | Richard Anderson (F.C.S.) - 1885 - عدد الصفحات: 498
...heat.] No example has yet occurred of an iron bar of rather more than half an inch square section, or of a cylinder of the same diameter, having been fused, or even heated red hot, by lightning. A rod of this size should therefore be sufficient for a conductor, but as its terminal rod needs to rise... | |
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... by it are frequently set on fire. No instance has yet occurred of an iron bar, of rather more than half an inch square, or of a cylinder of the same diameter, having been fused, or even heated red hot by lightning. A bar of this size would therefore... 