Report of the Delegates from the Following Societies, Viz: Meteorological Society, Royal Institute of British Architects, Society of Telegraph Engineers and of Electricians, Physical Society. With a Code of Rules for the Erection of Lightning Conductors; and Various AppendicesGeorge James Symons |
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Abstracted Acad accident Appendix atmospheric electricity Becquerel Blitz Blitzableiter BOOTHAM BAR brick building centimetres chimney church cloud Conduttori construction copper band copper rod copper wire damage discharge disruptive discharge distance ductor earth connection earth terminal effects of Lightning electric fluid erected experiments feet fixed flash foudre Fulmine G. J. Symons galvanized ground gutters height holdfasts inch inch diameter injured insulated iron rod iron wire joints la Foudre lantern lead length lightning conductors lightning rods lightning struck London main conductor masses of metal masts melted metres Milano millimetres moist earth ning Paratonnerres Paris passed Phil pinnacle plate platinum portion powder magazines Prof protected radius rain ridge roof screwed sectional area ships Sir W. S. Snow Harris soldered solid spire square steeple stone storm struck by lightning surface tape telegraph thunder thunderstorm Tonnerre tower trees Trinity House upper terminal wall wire rope
Popular passages
Page 150 - Mémoire sur les effets de la Foudre sur les arbres et les plantes ligneuses, et l'emploi des arbres comme parratonnerres.
Page 234 - It is still safer to bring two or three mattresses or beds into the middle of the room, and, folding them up double, place the chair upon them...
Page 17 - FIXING. — Rods should preferentially be taken down the side of the building which is most exposed to rain. They should be held firmly, but the holdfast should not be driven in so tightly as to pinch the rod or prevent the contraction and expansion produced by changes of temperature.
Page 19 - It is essential that the lower extremity of the conductor be buried in permanently damp soil; hence proximity to rain-water pipes, and to drains, is desirable. It is a very good plan to make the conductor bifurcate close below the surface of the ground, and adopt two of the following methods for securing the escape of the lightning into the earth. A strip of copper tape may be led from the bottom of the rod to the nearest gas or water main — not merely to a lead pipe...
Page 19 - COLLIERIES. — Undoubted evidence exists of the explosion of fire-damp in collieries through sparks from atmospheric electricity being led into the mine by the wire ropes of the shaft and the iron rails of the galleries. Hence the head gear of all shafts should be protected by proper lightning conductors.
Page 80 - I say, if these things are so, may not the knowledge of this power of points be of use to mankind, in preserving houses, churches, ships, &c. from the stroke of lightning, by directing us to fix, on the highest parts of those edifices, upright rods of iron made sharp as a needle, and gilt to prevent rusting, and from the foot of those rods a wire down the outside of the building into the ground, or down round one of the shrouds of a...
Page 19 - INSPECTION. — Before giving his final certificate the architect should have the conductor satisfactorily examined and tested by a qualified person, as injury to it often occurs up to the latest period of the works from accidental causes, and often from the carelessness of workmen.
Page 18 - The rod should not be bent abruptly round sharp corners. In no case should the length of the rod between two points be more than half as long again as the straight line joining them. Where a string course or other projecting stonework will admit of it, the rod may be carried straight through, instead of round the projection. In such a case the hole should be large enough to allow the conductor to pass freely, and allow for expansion, etc.
Page 172 - Cloth boards 2 6 Tempest (The): an Account of the Origin and Phenomena of Wind in various parts of the World. By CHARLES TOMLINSON. With numerous woodcuts and diagrams. Fcap.
Page 110 - ... and, since to connect a telegraph-wire with the conductor would render the telegraph useless, no telegraph from without should be allowed to enter a powder-mill, though there may be electric' bells and other telegraphic apparatus entirely within the building. I have supposed the powder-mill to be entirely sheathed in thick sheet-copper. This, however, is by no means necessary in order to prevent any sensible electrical effect taking place within it, supposing it struck by lightning. It is quite...