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etching, “stillimage”, “printsandphotographs”, pp, nationallibraryofmedicine, nlm, imagesfromthehistoryofmedicine, ihm, historyofmedicinedivision, hmd, “nationalinstitutesofhealth”, nih, water, potable, suitablefordrinking, drinkableliquids, georgecruikshank, johnedward, southwarkwaterworks, thamesriver, trident, drownedanimals, prongssludge, sewers, london, watertreatmentsystem, watersupply, sterilizingwater, drinkingbehaviorwater, sanitaryengineering, watersterilization, distill, microbiology, waterdistributionsystem, waterdistillationmechanisms, publicdomain, h20, archivesofmedicine, nlmdigitalcollection
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