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- W2022731202 abstract "ABOUT two years ago, I wished to know from time to time the rate at which a river was rising after a fall of rain. The river was at a considerable distance from the spot where its height was to be known. By means of the combination of two organ pipes, and a telephonic circuit, described in the following lines, I have been able to make the required measurement within rather close limits. At the river station, an organ pipe was fixed vertically in an inverted position, so that the water in the river acted as a stopper to the pipe, and the rise or fall of the water determined the note it gave, when blown by a small bellows driven by a very small water-wheel. A microphone was attached to the upper end of the organ pipe; this was in circuit with a wire leading to a town station at some distance; at the town station there was an exactly similar organ pipe, which could be lowered into a vessel full of water while it was sounding. By means of the telephone the note given by the pipe at the river was clearly heard at the town station; then the organ pipe at this station was lowered or raised by hand until it gave the same note. The lengths of the organ pipes under water at the two stations were then equal, so that the height of the water in the distant river was known." @default.
- W2022731202 created "2016-06-24" @default.
- W2022731202 creator A5001284644 @default.
- W2022731202 date "1892-07-01" @default.
- W2022731202 modified "2023-09-26" @default.
- W2022731202 title "An Acoustic Method whereby the Depth of Water in a River may be measured at a Distance" @default.
- W2022731202 doi "https://doi.org/10.1038/046246d0" @default.
- W2022731202 hasPublicationYear "1892" @default.
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