A valve to prevent backflow… so the river doesn’t wind up in the reservoir, or the effluent in the shower pipes.
From A practical treatise on hydraulic and water-supply engineering:… Read the rest “Science Art: Check Valve, 1882.”
This is an illustration of a public waterwork taken from the pages of A practical treatise on hydraulic and water-supply engineering: relating to the hydrology, hydrodynamics, and practical… Read the rest “Science Art: Intercepting Well, Prospect Park, Brooklyn, by R.S. Bross, 1882.”
Nature shares satellite data that shows not only lakes, rivers and reservoirs shrinking across the whole U.S. Southwest, but even water underground is going away:
… Read the rest “The West is drying up.”To track groundwater
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