Note, these are the conditions of good water. One condition is that it heats easily and cools suddenly. Another that there be no foreign bodies visible therein. Another that it be not turbid. Another that it be not ugly and evil-tasting. Another condition is: if two waters be taken and a little lixivium 109 mixed therein, then whichever does not become turbid, is the better of them. Another condition: take two identical cloths and wet them entirely in two different waters equally, and dry them equally; whichever cloth dries quickest, that water, wherein it was wet, is the best water. Another condition: take equal quantities of two different waters, and which ever is lightest is the best. He says also not to use water that goes through pipes, for according to all true doctors it is not good.