[JustSayNoToNannies]

Somebody thought a single authority should "control" purity of ingredients

Maybe - but that idea never made it into the Constitution. To "fix the Standard of Weights and Measures" is merely to say, for example, that a pound of weight is officially defined in such and such a manner - nothing more.

Remarkable how imaginatively Drug Warriors and other liberals are willing to read our founding document when it suits them.

and also knew that "weight" and "volume" were very good ways to do that.

[muawiyah]

I said right down to just this side of the point of granularity in the Universe. When you get to THOSE weights and measures you are dealing with things SMALLER than quarks.

"purity" of ingredients is a derivative of that authority ~