The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 284
ng or the presence of water : uponopening the box at which the wire is to be proved, tlie screw I must be takenout, and the feeler 1 m brought in contact with one end of the separatedwires, the other feeler being kept in contact with the pipe. If this portionof the conducting wire is sound, the… … contact existing between that portion of the wire and the tube. Supposingthe experiment to he tried again at the next box, and the contact proved tolie between the two boxes, the intervening faulty portion of wire is exchangedfor the sound wire marked 0, (which is a spare wire introduced by such…
Architecture · Civil engineering · Science
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