Editing Density (section)

=== Density, floating, and sinking ===
The understanding that different materials have different densities, and of a relationship between density, floating, and sinking must date to prehistoric times. Much later it was put in writing. [[Aristotle]], for example, wrote:<ref>{{Cite book |last=Aristotle. |url=https://archive.org/details/aristotle0000hdpl/page/n7/mode/2up |title=Meteorologica |publisher=Harvard University Press |year=1952 |pages=2.3, 359a |language=Ancient Greek, English |translator-last=Lee |translator-first=H. D. P. |orig-date=c. 340 BC}}</ref>
{{Blockquote|text=There is so great a difference in density between salt and fresh water that vessels laden with cargoes of the same weight almost sink in rivers, but ride quite easily at sea and are quite seaworthy. And an ignorance of this has sometimes cost people dear who load their ships in rivers. The following is a proof that the density of a fluid is greater when a substance is mixed with it. If you make water very salt by mixing salt in with it, eggs will float on it. ... If there were any truth in the stories they tell about the lake in Palestine it would further bear out what I say. For they say if you bind a man or beast and throw him into it he floats and does not sink beneath the surface.|author=Aristotle|title=[[Meteorologica]]|source=Book II, Chapter III}}