Rensselaer Union, Volume 11, Number 5, Rensselaer, Jasper County, 17 October 1878 — Lightning Rods. [ARTICLE]

Lightning Rods.

For the benefit of those of our readers who contemplate putting lightning rods upon their buildings, we publish the following suggestions by tne late Prof. Henry, of the Smithsonian Institute, a most eminent authority on this subject, with the added, suggestion that the rods should be oxaminea frequently to see that the conditions on which protection depends are preserved: (1) The. rod should consist of round iron about one inch in diameter; its parts throughout the whole length should be in perfect metallio continuity, by being secured together by coupling ferrules. (2) To secure it from rust the rod should be coated with black paint, itself a good conductor. (8) It should terminate in a single platinum point. (4) The shorter and more direct the course of the rod to the earth the better, bondings should be rounded find uot formed in acute angles. <6) It should be fastened to the building by iron eyes, and may be insnlated from these by cylinders of glass (I don’t, consider the Tatter of muclt importance). (6)‘ The rod should be connected with the eavth in the most •perfect manner possiblerAud-nothing is better for this purpose than to place it, in metallic contact with the gas 'pipes, or, bettor, the water pipes cf the city. This connection may ne made by a ribbon of copper or iron soldered to the end of the rod at one of its extremities, and wrapped afound the pipe at the other. If a connection of this kind is impracticable the rod should be eontinned horiaontally to the nearest well, and then turned vertically downward until the end enters the water as deep Itnowpst level. The’ horizontal part of the rod may bo buried in a stratum of pounded charcoal and ashes. The rod should be placed in preference on the west side of the building. A j rod of this kind may be put up by an [ ordinary blacksmith.

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