Comments by "SeanBZA" (@SeanBZA) on "The Underground Clocks of Paris" video.

@dieseldragon6756 Well, it had been developed to a great extent then for gas distribution, so this was merely another use for the existing manufacturers of gas lines, and the designers had come up with empirical rules for just how par a pulse of pressure could go, and then sized the pipe appropriately.
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A solution to a problem that used things they knew worked. Would probably still be in use today if it had not been too expensive, as you can see from the USA still having a few sections of 100VDC systems still in use in SF, where it once was built out with the tram lines as a power source, and was sold to buildings along the routes as a convenient power source to drive things like elevators and pumps, along with winches and lighting as well.
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