Abstract
EXPERIMENTING with a pair of telephones the other day, I thought I would try if it were possible to utilise underground pipes as conductors. I therefore connected one terminal of each instrument with the gas and the other with the water-pipes, in two houses placed about thirty yards apart, and found that it was possible to carry on conversation by means of the instruments thus connected. The voices were not as distinct as if wire had been used, but singing was very plainly heard. I have not had the opportunity of trying a longer distance; perhaps some of your readers may test the matter further.
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STOCKDALE, W. The Telephone. Nature 17, 380 (1878). https://doi.org/10.1038/017380d0
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DOI: https://doi.org/10.1038/017380d0
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